Reverse relations

client/src/app/core/core-services/app-load.service.ts

@@ -1,7 +1,7 @@
 import { Injectable, Injector } from '@angular/core';
 
 import { AgendaAppConfig } from '../../site/agenda/agenda.config';
-import { AppConfig, ModelEntry, SearchableModelEntry } from '../app-config';
+import { AppConfig, ModelEntry, SearchableModelEntry } from '../definitions/app-config';
 import { BaseRepository } from 'app/core/repositories/base-repository';
 import { HistoryAppConfig } from 'app/site/history/history.config';
 import { ProjectorAppConfig } from 'app/site/projector/projector.config';
@@ -14,7 +14,7 @@ import { ServicesToLoadOnAppsLoaded } from '../core.module';
 import { MainMenuService } from './main-menu.service';
 import { MediafileAppConfig } from '../../site/mediafiles/mediafile.config';
 import { MotionsAppConfig } from '../../site/motions/motions.config';
-import { OnAfterAppsLoaded } from '../onAfterAppsLoaded';
+import { OnAfterAppsLoaded } from '../definitions/on-after-apps-loaded';
 import { plugins } from '../../../plugins';
 import { SearchService } from '../ui-services/search.service';
 import { isSearchable } from '../../site/base/searchable';

client/src/app/core/core-services/data-store.service.ts

@@ -5,7 +5,7 @@ import { Observable, Subject } from 'rxjs';
 import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
 import { BaseRepository } from '../repositories/base-repository';
 import { CollectionStringMapperService } from './collection-string-mapper.service';
-import { Deferred } from '../deferred';
+import { Deferred } from '../promises/deferred';
 import { StorageService } from './storage.service';
 
 /**
@@ -102,6 +102,13 @@ export class UpdateSlot {
         return this.deletedModels[collection] || [];
     }
 
+    /**
+     * @returns the mapping of all deleted models
+     */
+    public getDeletedModels(): CollectionIds {
+        return this.deletedModels;
+    }
+
     /**
      * Compares this object to another update slot.
      */
@@ -221,9 +228,12 @@ export class DataStoreUpdateManagerService {
             }
         });
 
-        // Phase 2: updating dependencies
+        // Phase 2: updating dependencies (deleting ad changing in this order)
         repositories.forEach(repo => {
-            if (repo.updateDependencies(slot.getChangedModels())) {
+            if (repo.updateDependenciesForDeletedModels(slot.getDeletedModels())) {
+                affectedRepos[repo.collectionString] = repo;
+            }
+            if (repo.updateDependenciesForChangedModels(slot.getChangedModels())) {
                 affectedRepos[repo.collectionString] = repo;
             }
         });

client/src/app/core/core-services/http.service.ts

@@ -4,7 +4,7 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { OpenSlidesStatusService } from './openslides-status.service';
-import { formatQueryParams, QueryParams } from '../query-params';
+import { formatQueryParams, QueryParams } from '../definitions/query-params';
 
 /**
  * Enum for different HTTPMethods

client/src/app/core/core-services/operator.service.ts

@@ -8,10 +8,10 @@ import { Group } from 'app/shared/models/users/group';
 import { ViewUser } from 'app/site/users/models/view-user';
 import { CollectionStringMapperService } from './collection-string-mapper.service';
 import { DataStoreService } from './data-store.service';
-import { Deferred } from '../deferred';
+import { Deferred } from '../promises/deferred';
 import { HttpService } from './http.service';
 import { OfflineService } from './offline.service';
-import { OnAfterAppsLoaded } from '../onAfterAppsLoaded';
+import { OnAfterAppsLoaded } from '../definitions/on-after-apps-loaded';
 import { OpenSlidesStatusService } from './openslides-status.service';
 import { StorageService } from './storage.service';
 import { User } from '../../shared/models/users/user';

client/src/app/core/core-services/ping.service.ts

@@ -3,8 +3,8 @@ import { ApplicationRef, Injectable } from '@angular/core';
 import { first, take } from 'rxjs/operators';
 
 import { ConstantsService } from './constants.service';
-import { Deferred } from '../deferred';
-import { TimeoutPromise } from '../timeout-promise';
+import { Deferred } from '../promises/deferred';
+import { TimeoutPromise } from '../promises/timeout-promise';
 import { WebsocketService } from './websocket.service';
 
 interface OpenSlidesSettings {

client/src/app/core/core-services/relation-manager.service.spec.ts

@@ -0,0 +1,16 @@
+import { inject, TestBed } from '@angular/core/testing';
+
+import { E2EImportsModule } from '../../../e2e-imports.module';
+import { RelationManagerService } from './relation-manager.service';
+
+describe('RelationManagerService', () => {
+    beforeEach(() => {
+        TestBed.configureTestingModule({
+            imports: [E2EImportsModule],
+            providers: [RelationManagerService]
+        });
+    });
+    it('should be created', inject([RelationManagerService], (service: RelationManagerService) => {
+        expect(service).toBeTruthy();
+    }));
+});

client/src/app/core/core-services/relation-manager.service.ts

@@ -0,0 +1,275 @@
+import { Injectable } from '@angular/core';
+
+import { BaseModel } from 'app/shared/models/base/base-model';
+import { BaseViewModel, ViewModelConstructor } from 'app/site/base/base-view-model';
+import {
+    BaseOrderedRelation,
+    isCustomRelationDefinition,
+    isGenericRelationDefinition,
+    isNestedRelationDefinition,
+    isNormalRelationDefinition,
+    isReverseRelationDefinition,
+    RelationDefinition,
+    ReverseRelationDefinition
+} from '../definitions/relations';
+import { ViewModelStoreService } from './view-model-store.service';
+
+/**
+ * Manages relations between view models. This service is and should only used by the
+ * base repository to offload maanging relations between view models.
+ */
+@Injectable({
+    providedIn: 'root'
+})
+export class RelationManagerService {
+    public constructor(private viewModelStoreService: ViewModelStoreService) {}
+
+    /**
+     * Sorts the array of foreign view models in the given view models for the given relation.
+     */
+    public sortByRelation<V extends BaseViewModel, VForegin extends BaseViewModel>(
+        relation: BaseOrderedRelation<VForegin>,
+        viewModel: V
+    ): void {
+        const order = relation.order;
+        viewModel['_' + relation.ownKey].sort((a: BaseViewModel, b: BaseViewModel) => {
+            if (!order || a[order] === b[order]) {
+                return a.id - b.id;
+            } else {
+                return a[order] - b[order];
+            }
+        });
+    }
+
+    /**
+     * Creates a view model from the given model and model ctor. All dependencies will be
+     * set accorting to relations.
+     */
+    public createViewModel<M extends BaseModel, V extends BaseViewModel>(
+        model: M,
+        modelCtor: ViewModelConstructor<V>,
+        relations: RelationDefinition[]
+    ): V {
+        const viewModel = new modelCtor(model) as V;
+
+        relations.forEach(relation => {
+            this.setRelationsInViewModel(model, viewModel, relation);
+        });
+
+        return viewModel;
+    }
+
+    /**
+     * Sets one foreign view model in the view model according to the relation and the information
+     * from the model.
+     */
+    protected setRelationsInViewModel<M extends BaseModel, V extends BaseViewModel>(
+        model: M,
+        viewModel: V,
+        relation: RelationDefinition
+    ): void {
+        // no reverse setting needed. This is done in the second phase of the ds-upgrade-manager
+        if (isReverseRelationDefinition(relation)) {
+            return;
+        }
+
+        if (
+            (relation.type === 'M2M' || relation.type === 'O2M') &&
+            model[relation.ownIdKey] &&
+            model[relation.ownIdKey].constructor === Array
+        ) {
+            const foreignViewModels = this.viewModelStoreService.getMany(
+                relation.foreignModel,
+                model[relation.ownIdKey]
+            );
+            viewModel['_' + relation.ownKey] = foreignViewModels;
+            this.sortByRelation(relation, viewModel);
+        } else if (relation.type === 'M2O') {
+            const foreignViewModel = this.viewModelStoreService.get(relation.foreignModel, model[relation.ownIdKey]);
+            viewModel['_' + relation.ownKey] = foreignViewModel;
+        } else if (isNestedRelationDefinition(relation)) {
+            const foreignViewModels: BaseViewModel[] = model[relation.ownKey].map(foreignModel =>
+                this.createViewModel(foreignModel, relation.foreignModel, relation.relationDefinition || [])
+            );
+            viewModel['_' + relation.ownKey] = foreignViewModels;
+            this.sortByRelation(relation, viewModel);
+        } else if (isGenericRelationDefinition(relation)) {
+            const contentObject = this.viewModelStoreService.get<BaseViewModel>(
+                model[relation.ownContentObjectDataKey].collection,
+                model[relation.ownContentObjectDataKey].id
+            );
+            if (contentObject && relation.isVForeign(contentObject)) {
+                viewModel['_' + relation.ownKey] = contentObject;
+            }
+        } else if (isCustomRelationDefinition(relation)) {
+            relation.setRelations(model, viewModel);
+        }
+    }
+
+    /**
+     * Updates an own view model with an deleted model implicit given by the deletedId and
+     * the collection via the relation.
+     *
+     * @return true, if something was updated.
+     */
+    public updateSingleDependencyForDeletedModel(
+        ownViewModel: BaseViewModel,
+        relation: ReverseRelationDefinition,
+        deletedId: number
+    ): boolean {
+        // In both relations, the ownViewModel holds an array of foreignViewModels. Try to find the deleted
+        // foreignViewModel in this array and remove it.
+        if (relation.type === 'O2M' || relation.type === 'M2M') {
+            const ownModelArray = <any>ownViewModel['_' + relation.ownKey];
+            if (!ownModelArray) {
+                return false;
+            }
+            // We have the array of foreign view models for our own view model. Put the foreignViewModel
+            // into it (replace or push).
+            const index = ownModelArray.findIndex(foreignViewModel => foreignViewModel.id === deletedId);
+            if (index > -1) {
+                ownModelArray.splice(index, 1);
+                return true;
+            }
+        }
+
+        // The ownViewModel holds one foreignViewModel. Check, if it is the deleted one.
+        else if (relation.type === 'M2O') {
+            if (ownViewModel['_' + relation.ownKey] && ownViewModel['_' + relation.ownKey].id === deletedId) {
+                ownViewModel['_' + relation.ownKey] = null;
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Updates an own view model with an implicit given model by the collection and changedId.
+     *
+     * @return true, if something was updated.
+     */
+    public updateSingleDependencyForChangedModel(
+        ownViewModel: BaseViewModel,
+        relation: RelationDefinition,
+        collection: string,
+        changedId: number
+    ): boolean {
+        if (isNormalRelationDefinition(relation)) {
+            if (relation.type === 'M2M' || relation.type === 'O2M') {
+                // For the side of the ownViewModel these relations are the same:
+                // the ownViewModel does have may foreign models and we do have a normal relation (not a
+                // reverse one), we just set the many-part of the relation in the ownViewModel.
+                if (
+                    ownViewModel[relation.ownIdKey] &&
+                    ownViewModel[relation.ownIdKey].constructor === Array &&
+                    ownViewModel[relation.ownIdKey].includes(changedId) // The foreign view model belongs to us.
+                ) {
+                    const foreignViewModel = <any>this.viewModelStoreService.get(collection, changedId);
+                    this.setForeingViewModelInOwnViewModelArray(foreignViewModel, ownViewModel, relation.ownKey);
+                    return true;
+                }
+            } else if (relation.type === 'M2O') {
+                if (ownViewModel[relation.ownIdKey] === <any>changedId) {
+                    // Check, if this is the matching foreign view model.
+                    ownViewModel['_' + relation.ownKey] = <any>this.viewModelStoreService.get(collection, changedId);
+                    return true;
+                }
+            }
+        } else if (isReverseRelationDefinition(relation)) {
+            const foreignViewModel = <any>this.viewModelStoreService.get(collection, changedId);
+
+            // The foreign model has one id. Check, if the ownViewModel is the matching view model.
+            // If so, add the foreignViewModel to the array from the ownViewModel (with many foreignViewModels)
+            if (relation.type === 'O2M') {
+                if (foreignViewModel[relation.foreignIdKey] === ownViewModel.id) {
+                    this.setForeingViewModelInOwnViewModelArray(foreignViewModel, ownViewModel, relation.ownKey);
+                    return true;
+                }
+            }
+
+            // The foreign model should hold an array of ids. If the ownViewModel is in it, the foreignViewModel must
+            // be included into the array from the ownViewModel (with many foreignViewModels)
+            else if (relation.type === 'M2M') {
+                if (
+                    foreignViewModel[relation.foreignIdKey] &&
+                    foreignViewModel[relation.foreignIdKey].constructor === Array &&
+                    foreignViewModel[relation.foreignIdKey].includes(ownViewModel.id)
+                ) {
+                    this.setForeingViewModelInOwnViewModelArray(foreignViewModel, ownViewModel, relation.ownKey);
+                    return true;
+                }
+            }
+
+            // The foreign model should hold an array of ids. If the ownViewModel is in it, the foreignViewModel is the
+            // one and only matching model for the ownViewModel
+            else if (relation.type === 'M2O') {
+                if (
+                    foreignViewModel[relation.foreignIdKey] &&
+                    foreignViewModel[relation.foreignIdKey].constructor === Array &&
+                    foreignViewModel[relation.foreignIdKey].includes(ownViewModel.id)
+                ) {
+                    ownViewModel['_' + relation.ownKey] = foreignViewModel;
+                    return true;
+                }
+            }
+        } else if (isNestedRelationDefinition(relation)) {
+            let updated = false;
+            (relation.relationDefinition || []).forEach(nestedRelation => {
+                const nestedViewModels = ownViewModel[relation.ownKey] as BaseViewModel[];
+                nestedViewModels.forEach(nestedViewModel => {
+                    if (
+                        this.updateSingleDependencyForChangedModel(
+                            nestedViewModel,
+                            nestedRelation,
+                            collection,
+                            changedId
+                        )
+                    ) {
+                        updated = true;
+                    }
+                });
+            });
+            return updated;
+        } else if (isCustomRelationDefinition(relation)) {
+            const foreignViewModel = <any>this.viewModelStoreService.get(collection, changedId);
+            return relation.updateDependency(ownViewModel, foreignViewModel);
+        } else if (isGenericRelationDefinition(relation)) {
+            const foreignModel = <any>this.viewModelStoreService.get(collection, changedId);
+            if (
+                foreignModel &&
+                foreignModel.collectionString === ownViewModel[relation.ownContentObjectDataKey].collection &&
+                foreignModel.id === ownViewModel[relation.ownContentObjectDataKey].id
+            ) {
+                if (relation.isVForeign(foreignModel)) {
+                    ownViewModel['_' + relation.ownKey] = foreignModel;
+                    return true;
+                } else {
+                    console.warn(`The object is not an ${relation.VForeignVerbose}:` + foreignModel);
+                }
+            }
+        }
+
+        return false;
+    }
+
+    private setForeingViewModelInOwnViewModelArray(
+        foreignViewModel: BaseViewModel,
+        ownViewModel: BaseViewModel,
+        ownKey: string
+    ): void {
+        let ownViewModelArray = <any>ownViewModel['_' + ownKey];
+        if (!ownViewModelArray) {
+            ownViewModel['_' + ownKey] = [];
+            ownViewModelArray = <any>ownViewModel['_' + ownKey]; // get the new reference
+        }
+        // We have the array of foreign view models for our own view model. Put the foreignViewModel
+        // into it (replace or push).
+        const index = ownViewModelArray.findIndex(_foreignViewModel => _foreignViewModel.id === foreignViewModel.id);
+        if (index < 0) {
+            ownViewModelArray.push(foreignViewModel);
+        } else {
+            ownViewModelArray[index] = foreignViewModel;
+        }
+    }
+}

client/src/app/core/core-services/websocket.service.ts

@@ -9,7 +9,7 @@ import { take } from 'rxjs/operators';
 import { TextDecoder, TextEncoder } from 'text-encoding';
 
 import { OpenSlidesStatusService } from './openslides-status.service';
-import { formatQueryParams, QueryParams } from '../query-params';
+import { formatQueryParams, QueryParams } from '../definitions/query-params';
 
 /**
  * The generic message format in which messages are send and recieved by the server.

client/src/app/core/core.module.ts

@@ -4,7 +4,7 @@ import { Title } from '@angular/platform-browser';
 
 import { ProjectionDialogComponent } from 'app/shared/components/projection-dialog/projection-dialog.component';
 import { ChoiceDialogComponent } from '../shared/components/choice-dialog/choice-dialog.component';
-import { OnAfterAppsLoaded } from './onAfterAppsLoaded';
+import { OnAfterAppsLoaded } from './definitions/on-after-apps-loaded';
 import { OperatorService } from './core-services/operator.service';
 import { PromptDialogComponent } from '../shared/components/prompt-dialog/prompt-dialog.component';
 

client/src/app/core/definitions/app-config.ts

@@ -1,10 +1,10 @@
 import { Type } from '@angular/core';
 
 import { BaseViewModel, ViewModelConstructor } from 'app/site/base/base-view-model';
-import { BaseModel, ModelConstructor } from '../shared/models/base/base-model';
-import { BaseRepository } from './repositories/base-repository';
-import { MainMenuEntry } from './core-services/main-menu.service';
-import { Searchable } from '../site/base/searchable';
+import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
+import { BaseRepository } from '../repositories/base-repository';
+import { MainMenuEntry } from '../core-services/main-menu.service';
+import { Searchable } from '../../site/base/searchable';
 
 interface BaseModelEntry {
     collectionString: string;

client/src/app/core/definitions/relations.ts

@@ -0,0 +1,190 @@
+import { BaseModel } from 'app/shared/models/base/base-model';
+import { BaseViewModel, ViewModelConstructor } from 'app/site/base/base-view-model';
+
+// All "standard" relations.
+export type RelationDefinition<VForeign extends BaseViewModel = BaseViewModel> =
+    | NormalRelationDefinition<VForeign>
+    | ReverseRelationDefinition<VForeign>
+    | NestedRelationDefinition<VForeign>
+    | CustomRelationDefinition<VForeign>
+    | GenericRelationDefinition<VForeign>;
+
+interface BaseRelationDefinition<VForeign extends BaseViewModel> {
+    /**
+     * The name of the property, where the foreign view model should be accessable.
+     * Note, that this must be a getter to a private variable `_<ownKey`!
+     *
+     * E.g. `category`. (private variable `_category`)
+     */
+    ownKey: string;
+
+    /**
+     * The model on the other side of the relation.
+     */
+    foreignModel: ViewModelConstructor<VForeign>;
+}
+
+export interface BaseOrderedRelation<VForeign extends BaseViewModel> extends BaseRelationDefinition<VForeign> {
+    /**
+     * Provide an extra key (holding a number) to order by.
+     * If the value is equal or no order key is given, the models
+     * will be sorted by id.
+     */
+    order?: string;
+}
+
+interface BaseNormalRelationDefinition<VForeign extends BaseViewModel> extends BaseRelationDefinition<VForeign> {
+    /**
+     * This is the key in the own model where the id(s) are given. Must be present in
+     * the model and view model. E.g. `category_id` in a motion.
+     */
+    ownIdKey: string;
+}
+
+/**
+ * These relations has to be read as in  an ER-model. The right side is always the
+ * model where the relation is defined.
+ * - M2O: From this model to another one, where this model is the right (many).
+ *        E.g. motions<->categories: One motions has One category; One category has
+ *        Many motions.
+ * - O2M: Reverse relation to M2O. E.g. defined for categories: One category has
+ *        Many motions and One motion has One category.
+ * - M2M: M2M relation from this to another model.
+ */
+
+interface NormalM2MRelationDefinition<VForeign extends BaseViewModel>
+    extends BaseNormalRelationDefinition<VForeign>,
+        BaseOrderedRelation<VForeign> {
+    type: 'M2M';
+}
+
+interface NormalO2MRelationDefinition<VForeign extends BaseViewModel>
+    extends BaseNormalRelationDefinition<VForeign>,
+        BaseOrderedRelation<VForeign> {
+    type: 'O2M';
+}
+
+interface NormalM2ORelationDefinition<VForeign extends BaseViewModel> extends BaseNormalRelationDefinition<VForeign> {
+    type: 'M2O';
+}
+
+export type NormalRelationDefinition<VForeign extends BaseViewModel = BaseViewModel> =
+    | NormalM2MRelationDefinition<VForeign>
+    | NormalO2MRelationDefinition<VForeign>
+    | NormalM2ORelationDefinition<VForeign>;
+
+export function isNormalRelationDefinition(obj: RelationDefinition): obj is NormalRelationDefinition<BaseViewModel> {
+    const relation = obj as NormalRelationDefinition<BaseViewModel>;
+    return (relation.type === 'M2O' || relation.type === 'O2M' || relation.type === 'M2M') && !!relation.ownIdKey;
+}
+
+interface BaseReverseRelationDefinition<VForeign extends BaseViewModel> {
+    /**
+     * The key with the id(s) is given in the foreign model. Must be present in
+     * the model and view model. E.g. `category_id` from a motion but the relation is
+     * defined for a category.
+     */
+    foreignIdKey: string;
+
+    /**
+     * The name of the property, where the foreign view model should be accessable.
+     * Note, that this must be a getter to a private variable `_<ownKey`!
+     *
+     * E.g. `category`. (private variable `_category`)
+     */
+    ownKey: string;
+
+    /**
+     * The model on the other side of the relation.
+     */
+    foreignModel: ViewModelConstructor<VForeign>;
+}
+
+interface ReverseM2MRelationDefinition<VForeign extends BaseViewModel>
+    extends BaseReverseRelationDefinition<VForeign>,
+        BaseOrderedRelation<VForeign> {
+    type: 'M2M';
+}
+
+interface ReverseO2MRelationDefinition<VForeign extends BaseViewModel>
+    extends BaseReverseRelationDefinition<VForeign>,
+        BaseOrderedRelation<VForeign> {
+    type: 'O2M';
+}
+
+interface ReverseM2ORelationDefinition<VForeign extends BaseViewModel> extends BaseReverseRelationDefinition<VForeign> {
+    type: 'M2O';
+}
+
+export type ReverseRelationDefinition<VForeign extends BaseViewModel = BaseViewModel> =
+    | ReverseM2MRelationDefinition<VForeign>
+    | ReverseO2MRelationDefinition<VForeign>
+    | ReverseM2ORelationDefinition<VForeign>;
+
+export function isReverseRelationDefinition(obj: RelationDefinition): obj is ReverseRelationDefinition<BaseViewModel> {
+    const relation = obj as ReverseRelationDefinition<BaseViewModel>;
+    return (relation.type === 'M2O' || relation.type === 'O2M' || relation.type === 'M2M') && !!relation.foreignIdKey;
+}
+
+/**
+ * Nested relations in the REST-API. For the most values see
+ * `NormalRelationDefinition`.
+ */
+interface NestedRelationDefinition<VForeign extends BaseViewModel> extends BaseOrderedRelation<VForeign> {
+    type: 'nested';
+    ownKey: string;
+
+    /**
+     * The nested relations.
+     */
+    relationDefinition?: RelationDefinition[];
+}
+
+export function isNestedRelationDefinition(obj: RelationDefinition): obj is NestedRelationDefinition<BaseViewModel> {
+    return obj.type === 'nested';
+}
+
+interface GenericRelationDefinition<VForeign extends BaseViewModel = BaseViewModel> {
+    type: 'generic';
+
+    /**
+     * The key where the model and view model holds the ContentObject (object with collection and id).
+     * Similar to ownIdKey.
+     */
+    ownContentObjectDataKey: string;
+
+    /**
+     * The key where to but the content object.
+     */
+    ownKey: string;
+
+    possibleModels: ViewModelConstructor<BaseViewModel>[];
+    isVForeign: (obj: any) => obj is VForeign;
+    VForeignVerbose: string;
+}
+
+export function isGenericRelationDefinition(obj: RelationDefinition): obj is GenericRelationDefinition<BaseViewModel> {
+    return obj.type === 'generic';
+}
+
+/**
+ * A custom relation with callbacks with things todo.
+ */
+interface CustomRelationDefinition<VForeign extends BaseViewModel> {
+    type: 'custom';
+    foreignModel: ViewModelConstructor<VForeign>;
+
+    /**
+     * Called, when the view model is created from the model.
+     */
+    setRelations: (model: BaseModel, viewModel: BaseViewModel) => void;
+
+    /**
+     * Called, when the dependency was updated.
+     */
+    updateDependency: (ownViewModel: BaseViewModel, foreignViewModel: VForeign) => boolean;
+}
+
+export function isCustomRelationDefinition(obj: RelationDefinition): obj is CustomRelationDefinition<BaseViewModel> {
+    return obj.type === 'custom';
+}

client/src/app/core/repositories/agenda/item-repository.service.ts

@@ -4,7 +4,9 @@ import { TranslateService } from '@ngx-translate/core';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import { TreeIdNode } from 'app/core/ui-services/tree.service';
 import { Item } from 'app/shared/models/agenda/item';
@@ -19,18 +21,19 @@ import {
 import { ViewMotion } from 'app/site/motions/models/view-motion';
 import { ViewMotionBlock } from 'app/site/motions/models/view-motion-block';
 import { ViewTopic } from 'app/site/topics/models/view-topic';
-import { BaseHasContentObjectRepository, GenericRelationDefinition } from '../base-has-content-object-repository';
+import { BaseHasContentObjectRepository } from '../base-has-content-object-repository';
 import { BaseIsAgendaItemContentObjectRepository } from '../base-is-agenda-item-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataStoreService } from '../../core-services/data-store.service';
 
-const ItemRelations: (RelationDefinition | GenericRelationDefinition)[] = [
+const ItemRelations: RelationDefinition[] = [
     {
         type: 'generic',
         possibleModels: [ViewMotion, ViewMotionBlock, ViewTopic, ViewAssignment],
         isVForeign: isBaseViewModelWithAgendaItem,
-        VForeignVerbose: 'BaseViewModelWithAgendaItem'
+        VForeignVerbose: 'BaseViewModelWithAgendaItem',
+        ownContentObjectDataKey: 'contentObjectData',
+        ownKey: 'contentObject'
     }
 ];
 
@@ -64,10 +67,11 @@ export class ItemRepositoryService extends BaseHasContentObjectRepository<
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private httpService: HttpService,
         private config: ConfigService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Item, ItemRelations);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Item, ItemRelations);
 
         this.setSortFunction((a, b) => a.weight - b.weight);
     }

client/src/app/core/repositories/agenda/list-of-speakers-repository.service.ts

@@ -4,7 +4,9 @@ import { TranslateService } from '@ngx-translate/core';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { ListOfSpeakers } from 'app/shared/models/agenda/list-of-speakers';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { ListOfSpeakersTitleInformation, ViewListOfSpeakers } from 'app/site/agenda/models/view-list-of-speakers';
@@ -19,19 +21,20 @@ import { ViewMotion } from 'app/site/motions/models/view-motion';
 import { ViewMotionBlock } from 'app/site/motions/models/view-motion-block';
 import { ViewTopic } from 'app/site/topics/models/view-topic';
 import { ViewUser } from 'app/site/users/models/view-user';
-import { BaseHasContentObjectRepository, GenericRelationDefinition } from '../base-has-content-object-repository';
+import { BaseHasContentObjectRepository } from '../base-has-content-object-repository';
 import { BaseIsListOfSpeakersContentObjectRepository } from '../base-is-list-of-speakers-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataStoreService } from '../../core-services/data-store.service';
 import { ItemRepositoryService } from './item-repository.service';
 
-const ListOfSpeakersRelations: (RelationDefinition | GenericRelationDefinition)[] = [
+const ListOfSpeakersRelations: RelationDefinition[] = [
     {
         type: 'generic',
         possibleModels: [ViewMotion, ViewMotionBlock, ViewTopic, ViewAssignment, ViewMediafile],
         isVForeign: isBaseViewModelWithListOfSpeakers,
-        VForeignVerbose: 'BaseViewModelWithListOfSpeakers'
+        VForeignVerbose: 'BaseViewModelWithListOfSpeakers',
+        ownContentObjectDataKey: 'contentObjectData',
+        ownKey: 'contentObject'
     },
     {
         type: 'nested',
@@ -40,7 +43,7 @@ const ListOfSpeakersRelations: (RelationDefinition | GenericRelationDefinition)[
         order: 'weight',
         relationDefinition: [
             {
-                type: 'O2M',
+                type: 'M2O',
                 ownIdKey: 'user_id',
                 ownKey: 'user',
                 foreignModel: ViewUser
@@ -79,10 +82,20 @@ export class ListOfSpeakersRepositoryService extends BaseHasContentObjectReposit
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private httpService: HttpService,
         private itemRepo: ItemRepositoryService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, ListOfSpeakers, ListOfSpeakersRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            ListOfSpeakers,
+            ListOfSpeakersRelations
+        );
     }
 
     public getVerboseName = (plural: boolean = false) => {

client/src/app/core/repositories/assignments/assignment-repository.service.ts

@@ -4,7 +4,9 @@ import { TranslateService } from '@ngx-translate/core';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { Assignment } from 'app/shared/models/assignments/assignment';
 import { AssignmentPoll } from 'app/shared/models/assignments/assignment-poll';
 import { AssignmentTitleInformation, ViewAssignment } from 'app/site/assignments/models/view-assignment';
@@ -15,7 +17,6 @@ import { ViewMediafile } from 'app/site/mediafiles/models/view-mediafile';
 import { ViewTag } from 'app/site/tags/models/view-tag';
 import { ViewUser } from 'app/site/users/models/view-user';
 import { BaseIsAgendaItemAndListOfSpeakersContentObjectRepository } from '../base-is-agenda-item-and-list-of-speakers-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataStoreService } from '../../core-services/data-store.service';
 
@@ -39,7 +40,7 @@ const AssignmentRelations: RelationDefinition[] = [
         order: 'weight',
         relationDefinition: [
             {
-                type: 'O2M',
+                type: 'M2O',
                 ownIdKey: 'user_id',
                 ownKey: 'user',
                 foreignModel: ViewUser
@@ -58,7 +59,7 @@ const AssignmentRelations: RelationDefinition[] = [
                 order: 'weight',
                 relationDefinition: [
                     {
-                        type: 'O2M',
+                        type: 'M2O',
                         ownIdKey: 'user_id',
                         ownKey: 'user',
                         foreignModel: ViewUser
@@ -104,10 +105,20 @@ export class AssignmentRepositoryService extends BaseIsAgendaItemAndListOfSpeake
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        protected translate: TranslateService,
+        translate: TranslateService,
+        relationManager: RelationManagerService,
         private httpService: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Assignment, AssignmentRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            Assignment,
+            AssignmentRelations
+        );
     }
 
     public getTitle = (titleInformation: AssignmentTitleInformation) => {

client/src/app/core/repositories/base-has-content-object-repository.ts

@@ -1,25 +1,8 @@
-import { TranslateService } from '@ngx-translate/core';
-
-import { ModelConstructor } from 'app/shared/models/base/base-model';
 import { BaseModelWithContentObject } from 'app/shared/models/base/base-model-with-content-object';
 import { ContentObject } from 'app/shared/models/base/content-object';
-import { BaseViewModel, TitleInformation, ViewModelConstructor } from 'app/site/base/base-view-model';
+import { BaseViewModel, TitleInformation } from 'app/site/base/base-view-model';
 import { BaseViewModelWithContentObject } from 'app/site/base/base-view-model-with-content-object';
-import { BaseRepository, RelationDefinition } from './base-repository';
-import { CollectionStringMapperService } from '../core-services/collection-string-mapper.service';
-import { DataSendService } from '../core-services/data-send.service';
-import { DataStoreService } from '../core-services/data-store.service';
-import { ViewModelStoreService } from '../core-services/view-model-store.service';
-
-/**
- * A generic relation for models with a content_object
- */
-export interface GenericRelationDefinition<VForeign extends BaseViewModel = BaseViewModel> {
-    type: 'generic';
-    possibleModels: ViewModelConstructor<BaseViewModel>[];
-    isVForeign: (obj: any) => obj is VForeign;
-    VForeignVerbose: string;
-}
+import { BaseRepository } from './base-repository';
 
 /**
  * A base repository for objects that *have* content objects, e.g. items and lists of speakers.
@@ -40,99 +23,6 @@ export abstract class BaseHasContentObjectRepository<
         };
     } = {};
 
-    public constructor(
-        DS: DataStoreService,
-        dataSend: DataSendService,
-        collectionStringMapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService,
-        baseModelCtor: ModelConstructor<M>,
-        relationDefinitions: (RelationDefinition | GenericRelationDefinition)[] = []
-    ) {
-        super(DS, dataSend, collectionStringMapperService, viewModelStoreService, translate, baseModelCtor, <
-            RelationDefinition[]
-        >relationDefinitions); // This cast "hides" the new generic relation from the base repository. Typescript can't handle this...
-    }
-
-    protected _groupRelationsByCollections(
-        relation: RelationDefinition | GenericRelationDefinition,
-        baseRelation: RelationDefinition
-    ): void {
-        if (relation.type === 'generic') {
-            relation.possibleModels.forEach(ctor => {
-                const collection = ctor.COLLECTIONSTRING;
-                if (!this.relationsByCollection[collection]) {
-                    this.relationsByCollection[collection] = [];
-                }
-                // The cast to any is needed to convince Typescript, that a GenericRelationDefinition can also
-                // be used as a RelationDefinition
-                this.relationsByCollection[collection].push(<any>baseRelation);
-            });
-        } else {
-            super._groupRelationsByCollections(relation, baseRelation);
-        }
-    }
-
-    /**
-     * Adds the generic relation.
-     */
-    protected updateSingleDependency(
-        ownViewModel: V,
-        relation: RelationDefinition | GenericRelationDefinition,
-        collection: string,
-        changedId: number
-    ): boolean {
-        if (relation.type === 'generic') {
-            const foreignModel = <any>this.viewModelStoreService.get(collection, changedId);
-            if (
-                foreignModel &&
-                foreignModel.collectionString === ownViewModel.contentObjectData.collection &&
-                foreignModel.id === ownViewModel.contentObjectData.id
-            ) {
-                if (relation.isVForeign(foreignModel)) {
-                    (<any>ownViewModel)._contentObject = foreignModel;
-                    return true;
-                } else {
-                    console.warn(`The object is not an ${relation.VForeignVerbose}:` + foreignModel);
-                }
-
-                // TODO: set reverse
-            }
-            return false;
-        } else {
-            return super.updateSingleDependency(ownViewModel, relation, collection, changedId);
-        }
-    }
-
-    /**
-     * Adds the generic relation.
-     */
-    protected setRelationsInViewModel<K extends BaseViewModel = V>(
-        model: M,
-        viewModel: K,
-        relation: RelationDefinition | GenericRelationDefinition
-    ): void {
-        if (relation.type === 'generic') {
-            (<any>viewModel)._contentObject = this.getContentObject(model, relation);
-        } else {
-            super.setRelationsInViewModel(model, viewModel, relation);
-        }
-    }
-
-    /**
-     * Tries to get the content object (as a view model) from the given model and relation.
-     */
-    protected getContentObject(model: M, relation: GenericRelationDefinition): BaseViewModel {
-        const contentObject = this.viewModelStoreService.get<BaseViewModel>(
-            model.content_object.collection,
-            model.content_object.id
-        );
-        if (!contentObject || !relation.isVForeign(contentObject)) {
-            return null;
-        }
-        return contentObject;
-    }
-
     /**
      * Returns the object with has the given content object as the content object.
      *

client/src/app/core/repositories/base-is-agenda-item-and-list-of-speakers-content-object-repository.ts

@@ -1,6 +1,4 @@
-import { TranslateService } from '@ngx-translate/core';
-
-import { BaseModel, ModelConstructor } from 'app/shared/models/base/base-model';
+import { BaseModel } from 'app/shared/models/base/base-model';
 import { ViewItem } from 'app/site/agenda/models/view-item';
 import { ViewListOfSpeakers } from 'app/site/agenda/models/view-list-of-speakers';
 import { BaseProjectableViewModel } from 'app/site/base/base-projectable-view-model';
@@ -17,11 +15,7 @@ import {
     IBaseIsListOfSpeakersContentObjectRepository,
     isBaseIsListOfSpeakersContentObjectRepository
 } from './base-is-list-of-speakers-content-object-repository';
-import { BaseRepository, RelationDefinition } from './base-repository';
-import { CollectionStringMapperService } from '../core-services/collection-string-mapper.service';
-import { DataSendService } from '../core-services/data-send.service';
-import { DataStoreService } from '../core-services/data-store.service';
-import { ViewModelStoreService } from '../core-services/view-model-store.service';
+import { BaseRepository } from './base-repository';
 
 export function isBaseIsAgendaItemAndListOfSpeakersContentObjectRepository(
     obj: any
@@ -43,35 +37,15 @@ export abstract class BaseIsAgendaItemAndListOfSpeakersContentObjectRepository<
     implements
         IBaseIsAgendaItemContentObjectRepository<V, M, T>,
         IBaseIsListOfSpeakersContentObjectRepository<V, M, T> {
-    public constructor(
-        DS: DataStoreService,
-        dataSend: DataSendService,
-        collectionStringMapperService: CollectionStringMapperService,
-        viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService,
-        baseModelCtor: ModelConstructor<M>,
-        relationDefinitions?: RelationDefinition[]
-    ) {
-        super(
-            DS,
-            dataSend,
-            collectionStringMapperService,
-            viewModelStoreService,
-            translate,
-            baseModelCtor,
-            relationDefinitions
-        );
-    }
-
     protected groupRelationsByCollections(): void {
         this.relationDefinitions.push({
-            type: 'O2M',
+            type: 'M2O',
             ownIdKey: 'agenda_item_id',
             ownKey: 'item',
             foreignModel: ViewItem
         });
         this.relationDefinitions.push({
-            type: 'O2M',
+            type: 'M2O',
             ownIdKey: 'list_of_speakers_id',
             ownKey: 'list_of_speakers',
             foreignModel: ViewListOfSpeakers

client/src/app/core/repositories/base-is-agenda-item-content-object-repository.ts

@@ -6,10 +6,12 @@ import {
     TitleInformationWithAgendaItem
 } from 'app/site/base/base-view-model-with-agenda-item';
 import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
-import { BaseRepository, RelationDefinition } from './base-repository';
+import { BaseRepository } from './base-repository';
 import { CollectionStringMapperService } from '../core-services/collection-string-mapper.service';
 import { DataSendService } from '../core-services/data-send.service';
 import { DataStoreService } from '../core-services/data-store.service';
+import { RelationManagerService } from '../core-services/relation-manager.service';
+import { RelationDefinition } from '../definitions/relations';
 import { ViewModelStoreService } from '../core-services/view-model-store.service';
 
 export function isBaseIsAgendaItemContentObjectRepository(
@@ -45,6 +47,7 @@ export abstract class BaseIsAgendaItemContentObjectRepository<
         collectionStringMapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         baseModelCtor: ModelConstructor<M>,
         relationDefinitions?: RelationDefinition[]
     ) {
@@ -54,6 +57,7 @@ export abstract class BaseIsAgendaItemContentObjectRepository<
             collectionStringMapperService,
             viewModelStoreService,
             translate,
+            relationManager,
             baseModelCtor,
             relationDefinitions
         );
@@ -61,7 +65,7 @@ export abstract class BaseIsAgendaItemContentObjectRepository<
 
     protected groupRelationsByCollections(): void {
         this.relationDefinitions.push({
-            type: 'O2M',
+            type: 'M2O',
             ownIdKey: 'agenda_item_id',
             ownKey: 'item',
             foreignModel: ViewItem

client/src/app/core/repositories/base-is-list-of-speakers-content-object-repository.ts

@@ -3,11 +3,13 @@ import { TranslateService } from '@ngx-translate/core';
 import { ViewListOfSpeakers } from 'app/site/agenda/models/view-list-of-speakers';
 import { BaseViewModelWithListOfSpeakers } from 'app/site/base/base-view-model-with-list-of-speakers';
 import { BaseModel, ModelConstructor } from '../../shared/models/base/base-model';
-import { BaseRepository, RelationDefinition } from './base-repository';
+import { BaseRepository } from './base-repository';
 import { TitleInformation } from '../../site/base/base-view-model';
 import { CollectionStringMapperService } from '../core-services/collection-string-mapper.service';
 import { DataSendService } from '../core-services/data-send.service';
 import { DataStoreService } from '../core-services/data-store.service';
+import { RelationManagerService } from '../core-services/relation-manager.service';
+import { RelationDefinition } from '../definitions/relations';
 import { ViewModelStoreService } from '../core-services/view-model-store.service';
 
 export function isBaseIsListOfSpeakersContentObjectRepository(
@@ -43,6 +45,7 @@ export abstract class BaseIsListOfSpeakersContentObjectRepository<
         collectionStringMapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         baseModelCtor: ModelConstructor<M>,
         relationDefinitions?: RelationDefinition[]
     ) {
@@ -52,6 +55,7 @@ export abstract class BaseIsListOfSpeakersContentObjectRepository<
             collectionStringMapperService,
             viewModelStoreService,
             translate,
+            relationManager,
             baseModelCtor,
             relationDefinitions
         );
@@ -59,7 +63,7 @@ export abstract class BaseIsListOfSpeakersContentObjectRepository<
 
     protected groupRelationsByCollections(): void {
         this.relationDefinitions.push({
-            type: 'O2M',
+            type: 'M2O',
             ownIdKey: 'list_of_speakers_id',
             ownKey: 'list_of_speakers',
             foreignModel: ViewListOfSpeakers

client/src/app/core/repositories/base-repository.ts

@@ -9,92 +9,16 @@ import { CollectionStringMapperService } from '../core-services/collection-strin
 import { DataSendService } from '../core-services/data-send.service';
 import { CollectionIds, DataStoreService } from '../core-services/data-store.service';
 import { Identifiable } from '../../shared/models/base/identifiable';
-import { OnAfterAppsLoaded } from '../onAfterAppsLoaded';
+import { OnAfterAppsLoaded } from '../definitions/on-after-apps-loaded';
+import { RelationManagerService } from '../core-services/relation-manager.service';
+import {
+    isNormalRelationDefinition,
+    isReverseRelationDefinition,
+    RelationDefinition,
+    ReverseRelationDefinition
+} from '../definitions/relations';
 import { ViewModelStoreService } from '../core-services/view-model-store.service';
 
-// All "standard" relations.
-export type RelationDefinition<VForeign extends BaseViewModel = BaseViewModel> =
-    | NormalRelationDefinition<VForeign>
-    | NestedRelationDefinition<VForeign>
-    | CustomRelationDefinition<VForeign>;
-
-/**
- * Normal relations.
- */
-interface NormalRelationDefinition<VForeign extends BaseViewModel> {
-    /**
-     * - O2M: From this model to another one, where this model is the One-side.
-     *        E.g. motions<->categories: One motions has One category; One category has
-     *        Many motions
-     * - M2M: M2M relation from this to another model.
-     */
-    type: 'M2M' | 'O2M';
-
-    /**
-     * The key where the id(s) are given. Must be present in the model and view model. E.g. `category_id`.
-     */
-    ownIdKey: string;
-
-    /**
-     * The name of the property, where the foreign view model should be accessable.
-     * Note, that this must be a getter to a private variable `_<ownKey`!
-     *
-     * E.g. `category`. (private variable `_category`)
-     */
-    ownKey: string;
-
-    /**
-     * The model on the other side of the relation.
-     */
-    foreignModel: ViewModelConstructor<VForeign>;
-
-    /**
-     * TODO: reverse relations.
-     */
-    foreignKey?: keyof VForeign;
-}
-
-/**
- * Nested relations in the REST-API. For the most values see
- * `NormalRelationDefinition`.
- */
-interface NestedRelationDefinition<VForeign extends BaseViewModel> {
-    type: 'nested';
-    ownKey: string;
-    foreignModel: ViewModelConstructor<VForeign>;
-    foreignKey?: keyof VForeign;
-
-    /**
-     * The nested relations.
-     */
-    relationDefinition?: RelationDefinition[];
-
-    /**
-     * Provide an extra key (holding a number) to order by.
-     * If the value is equal or no order key is given, the models
-     * will be sorted by id.
-     */
-    order?: string;
-}
-
-/**
- * A custom relation with callbacks with things todo.
- */
-interface CustomRelationDefinition<VForeign extends BaseViewModel> {
-    type: 'custom';
-    foreignModel: ViewModelConstructor<VForeign>;
-
-    /**
-     * Called, when the view model is created from the model.
-     */
-    setRelations: (model: BaseModel, viewModel: BaseViewModel) => void;
-
-    /**
-     * Called, when the dependency was updated.
-     */
-    updateDependency: (ownViewModel: BaseViewModel, foreignViewModel: VForeign) => boolean;
-}
-
 export abstract class BaseRepository<V extends BaseViewModel & T, M extends BaseModel, T extends TitleInformation>
     implements OnAfterAppsLoaded, Collection {
     /**
@@ -163,6 +87,8 @@ export abstract class BaseRepository<V extends BaseViewModel & T, M extends Base
      */
     protected relationsByCollection: { [collection: string]: RelationDefinition<BaseViewModel>[] } = {};
 
+    protected reverseRelationsByCollection: { [collection: string]: ReverseRelationDefinition<BaseViewModel>[] } = {};
+
     /**
      * The view model ctor of the encapsulated view model.
      */
@@ -183,12 +109,14 @@ export abstract class BaseRepository<V extends BaseViewModel & T, M extends Base
         protected collectionStringMapperService: CollectionStringMapperService,
         protected viewModelStoreService: ViewModelStoreService,
         protected translate: TranslateService,
+        protected relationManager: RelationManagerService,
         protected baseModelCtor: ModelConstructor<M>,
         protected relationDefinitions: RelationDefinition<BaseViewModel>[] = []
     ) {
         this._collectionString = baseModelCtor.COLLECTIONSTRING;
 
         this.groupRelationsByCollections();
+        this.buildReverseRelationsGrouping();
 
         // All data is piped through an auditTime of 1ms. This is to prevent massive
         // updates, if e.g. an autoupdate with a lot motions come in. The result is just one
@@ -219,15 +147,39 @@ export abstract class BaseRepository<V extends BaseViewModel & T, M extends Base
             (relation.relationDefinition || []).forEach(nestedRelation => {
                 this._groupRelationsByCollections(nestedRelation, baseRelation);
             });
-        } else if (relation.type === 'O2M' || relation.type === 'M2M' || relation.type === 'custom') {
+        } else if (
+            relation.type === 'M2O' ||
+            relation.type === 'M2M' ||
+            relation.type === 'O2M' ||
+            relation.type === 'custom'
+        ) {
             const collection = relation.foreignModel.COLLECTIONSTRING;
             if (!this.relationsByCollection[collection]) {
                 this.relationsByCollection[collection] = [];
             }
             this.relationsByCollection[collection].push(baseRelation);
+        } else if (relation.type === 'generic') {
+            relation.possibleModels.forEach(ctor => {
+                const collection = ctor.COLLECTIONSTRING;
+                if (!this.relationsByCollection[collection]) {
+                    this.relationsByCollection[collection] = [];
+                }
+                this.relationsByCollection[collection].push(baseRelation);
+            });
         }
     }
 
+    protected buildReverseRelationsGrouping(): void {
+        Object.keys(this.relationsByCollection).forEach(collection => {
+            const reverseRelations = this.relationsByCollection[collection].filter(relation =>
+                isReverseRelationDefinition(relation)
+            ) as ReverseRelationDefinition<BaseViewModel>[];
+            if (reverseRelations.length) {
+                this.reverseRelationsByCollection[collection] = reverseRelations;
+            }
+        });
+    }
+
     public onAfterAppsLoaded(): void {
         this.baseViewModelCtor = this.collectionStringMapperService.getViewModelConstructor(this.collectionString);
         this.DS.clearObservable.subscribe(() => this.clear());
@@ -274,82 +226,27 @@ export abstract class BaseRepository<V extends BaseViewModel & T, M extends Base
      * are assigned to the new view model.
      */
     protected createViewModelWithTitles(model: M): V {
-        const viewModel = this.createViewModel(model, this.baseViewModelCtor, this.relationDefinitions);
+        const viewModel = this.relationManager.createViewModel(model, this.baseViewModelCtor, this.relationDefinitions);
         viewModel.getTitle = () => this.getTitle(viewModel);
         viewModel.getListTitle = () => this.getListTitle(viewModel);
         viewModel.getVerboseName = this.getVerboseName;
         return viewModel;
     }
 
-    /**
-     * Creates a view model from the given model and model ctor. All dependencies will be
-     * set accorting to relations.
-     */
-    protected createViewModel<K extends BaseViewModel = V>(
-        model: M,
-        modelCtor: ViewModelConstructor<K>,
-        relations: RelationDefinition[]
-    ): K {
-        const viewModel = new modelCtor(model) as K;
-
-        // no reverse setting needed
-        relations.forEach(relation => {
-            this.setRelationsInViewModel(model, viewModel, relation);
-        });
-
-        return viewModel;
-    }
-
-    /**
-     * Sets one foreign view model in the view model according to the relation and the information
-     * from the model.
-     */
-    protected setRelationsInViewModel<K extends BaseViewModel = V>(
-        model: M,
-        viewModel: K,
-        relation: RelationDefinition
-    ): void {
-        if (relation.type === 'M2M' && model[relation.ownIdKey] instanceof Array) {
-            const foreignViewModels = this.viewModelStoreService.getMany(
-                relation.foreignModel,
-                model[relation.ownIdKey]
-            );
-            viewModel['_' + relation.ownKey] = foreignViewModels;
-        } else if (relation.type === 'O2M') {
-            const foreignViewModel = this.viewModelStoreService.get(relation.foreignModel, model[relation.ownIdKey]);
-            viewModel['_' + relation.ownKey] = foreignViewModel;
-        } else if (relation.type === 'nested') {
-            const foreignViewModels: BaseViewModel[] = model[relation.ownKey].map(foreignModel =>
-                this.createViewModel(foreignModel, relation.foreignModel, relation.relationDefinition || [])
-            );
-            foreignViewModels.sort((a: BaseViewModel, b: BaseViewModel) => {
-                const order = relation.order;
-                if (!relation.order || a[order] === b[order]) {
-                    return a.id - b.id;
-                } else {
-                    return a[order] - b[order];
-                }
-            });
-            viewModel['_' + relation.ownKey] = foreignViewModels;
-        } else if (relation.type === 'custom') {
-            relation.setRelations(model, viewModel);
-        }
-    }
-
     /**
      * Updates all models in this repository with all changed models.
      *
      * @param changedModels A mapping of collections to ids of all changed models.
      * @returns if at least one model was affected.
      */
-    public updateDependencies(changedModels: CollectionIds): boolean {
+    public updateDependenciesForChangedModels(changedModels: CollectionIds): boolean {
         if (!this.relationDefinitions.length) {
-            return;
+            return false;
         }
 
         // Get all viewModels from this repo once.
-        const viewModels = this.getViewModelList();
-        let somethingUpdated = false;
+        const ownViewModels = this.getViewModelList();
+        const updatedIds = [];
         Object.keys(changedModels).forEach(collection => {
             const dependencyChanged: boolean = Object.keys(this.relationsByCollection).includes(collection);
             if (!dependencyChanged) {
@@ -357,85 +254,79 @@ export abstract class BaseRepository<V extends BaseViewModel & T, M extends Base
             }
 
             // Ok, we are affected by this collection. Update all viewModels from this repo.
-            viewModels.forEach(ownViewModel => {
-                const relations = this.relationsByCollection[collection];
-                if (!relations || !relations.length) {
-                    return;
-                }
+            const relations = this.relationsByCollection[collection];
+            ownViewModels.forEach(ownViewModel => {
                 relations.forEach(relation => {
                     changedModels[collection].forEach(id => {
-                        if (this.updateSingleDependency(ownViewModel, relation, collection, id)) {
-                            somethingUpdated = true;
+                        if (
+                            this.relationManager.updateSingleDependencyForChangedModel(
+                                ownViewModel,
+                                relation,
+                                collection,
+                                id
+                            )
+                        ) {
+                            updatedIds.push(ownViewModel.id);
                         }
                     });
                 });
             });
-        });
-        if (somethingUpdated) {
-            viewModels.forEach(ownViewModel => {
-                this.updateViewModelObservable(ownViewModel.id);
-            });
-        }
-        return somethingUpdated;
-    }
-
-    /**
-     * Updates an own view model with an implicit given model by the collection and changedId.
-     *
-     * @return true, if something was updated.
-     */
-    protected updateSingleDependency(
-        ownViewModel: BaseViewModel,
-        relation: RelationDefinition,
-        collection: string,
-        changedId: number
-    ): boolean {
-        if (relation.type === 'M2M') {
-            if (
-                ownViewModel[relation.ownIdKey] &&
-                ownViewModel[relation.ownIdKey] instanceof Array &&
-                ownViewModel[relation.ownIdKey].includes(changedId)
-            ) {
-                const foreignViewModel = <any>this.viewModelStoreService.get(collection, changedId);
-                let ownModelArray = <any>ownViewModel['_' + relation.ownKey];
-                if (!ownModelArray) {
-                    ownViewModel['_' + relation.ownKey] = [];
-                    ownModelArray = <any>ownViewModel['_' + relation.ownKey];
-                }
-                const index = ownModelArray.findIndex(user => user.id === changedId);
-                if (index < 0) {
-                    ownModelArray.push(foreignViewModel);
-                } else {
-                    ownModelArray[index] = foreignViewModel;
-                }
-                // TODO: set reverse
-
-                return true;
-            }
-        } else if (relation.type === 'O2M') {
-            if (ownViewModel[relation.ownIdKey] === <any>changedId) {
-                ownViewModel['_' + relation.ownKey] = <any>this.viewModelStoreService.get(collection, changedId);
-                // TODO: set reverse
-
-                return true;
-            }
-        } else if (relation.type === 'nested') {
-            let updated = false;
-            (relation.relationDefinition || []).forEach(nestedRelation => {
-                const nestedViewModels = ownViewModel[relation.ownKey] as BaseViewModel[];
-                nestedViewModels.forEach(nestedViewModel => {
-                    if (this.updateSingleDependency(nestedViewModel, nestedRelation, collection, changedId)) {
-                        updated = true;
+            // Order all relations, if neeed.
+            if (updatedIds.length) {
+                relations.forEach(relation => {
+                    if (
+                        (isNormalRelationDefinition(relation) || isReverseRelationDefinition(relation)) &&
+                        (relation.type === 'M2M' || relation.type === 'O2M') &&
+                        relation.order
+                    ) {
+                        ownViewModels.forEach(ownViewModel => {
+                            if (ownViewModel['_' + relation.ownKey]) {
+                                this.relationManager.sortByRelation(relation, ownViewModel);
+                            }
+                        });
                     }
                 });
+            }
+
+            // Inform about changes. (List updates is done in `commitUpdate` via `DataStoreUpdateManagerService`)
+            updatedIds.forEach(id => {
+                this.updateViewModelObservable(id);
             });
-            return updated;
-        } else if (relation.type === 'custom') {
-            const foreignViewModel = <any>this.viewModelStoreService.get(collection, changedId);
-            return relation.updateDependency(ownViewModel, foreignViewModel);
+        });
+        return !!updatedIds.length;
+    }
+
+    public updateDependenciesForDeletedModels(deletedModels: CollectionIds): boolean {
+        if (!Object.keys(this.reverseRelationsByCollection).length) {
+            return false;
         }
 
-        return false;
+        // Get all viewModels from this repo once.
+        const ownViewModels = this.getViewModelList();
+        let somethingChanged = false;
+        Object.keys(deletedModels).forEach(collection => {
+            const dependencyChanged: boolean = Object.keys(this.reverseRelationsByCollection).includes(collection);
+            if (!dependencyChanged) {
+                return;
+            }
+
+            // Ok, we are affected by this collection. Update all viewModels from this repo.
+            const relations = this.reverseRelationsByCollection[collection];
+            ownViewModels.forEach(ownViewModel => {
+                relations.forEach(relation => {
+                    deletedModels[collection].forEach(id => {
+                        if (this.relationManager.updateSingleDependencyForDeletedModel(ownViewModel, relation, id)) {
+                            // Inform about changes. (List updates is done in `commitUpdate` via `DataStoreUpdateManagerService`)
+                            this.updateViewModelObservable(id);
+                            somethingChanged = true;
+                        }
+                    });
+                });
+            });
+            // Ordering all relations is not needed, because just deleting things out of arrays
+            // will not unorder them.
+        });
+        return somethingChanged;
     }
 
     /**

client/src/app/core/repositories/config/config-repository.service.ts

@@ -8,6 +8,7 @@ import { ConstantsService } from 'app/core/core-services/constants.service';
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { DataStoreService } from 'app/core/core-services/data-store.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { BaseRepository } from 'app/core/repositories/base-repository';
 import { Identifiable } from 'app/shared/models/base/identifiable';
@@ -112,10 +113,11 @@ export class ConfigRepositoryService extends BaseRepository<ViewConfig, Config,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private constantsService: ConstantsService,
         private http: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Config);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Config);
 
         this.constantsService.get('ConfigVariables').subscribe(constant => {
             this.createConfigStructure(constant);

client/src/app/core/repositories/mediafiles/mediafile-repository.service.ts

@@ -7,19 +7,20 @@ import { first, map } from 'rxjs/operators';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { Mediafile } from 'app/shared/models/mediafiles/mediafile';
 import { MediafileTitleInformation, ViewMediafile } from 'app/site/mediafiles/models/view-mediafile';
 import { ViewGroup } from 'app/site/users/models/view-group';
 import { BaseIsListOfSpeakersContentObjectRepository } from '../base-is-list-of-speakers-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataStoreService } from '../../core-services/data-store.service';
 
 const MediafileRelations: RelationDefinition[] = [
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'parent_id',
         ownKey: 'parent',
         foreignModel: ViewMediafile
@@ -64,9 +65,19 @@ export class MediafileRepositoryService extends BaseIsListOfSpeakersContentObjec
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
         dataSend: DataSendService,
+        relationManager: RelationManagerService,
         private httpService: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Mediafile, MediafileRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            Mediafile,
+            MediafileRelations
+        );
         this.directoryBehaviorSubject = new BehaviorSubject([]);
         this.getViewModelListObservable().subscribe(mediafiles => {
             if (mediafiles) {

client/src/app/core/repositories/motions/category-repository.service.ts

@@ -2,12 +2,14 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { TreeIdNode } from 'app/core/ui-services/tree.service';
 import { Category } from 'app/shared/models/motions/category';
-import { Motion } from 'app/shared/models/motions/motion';
 import { CategoryTitleInformation, ViewCategory } from 'app/site/motions/models/view-category';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { ViewMotion } from 'app/site/motions/models/view-motion';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
@@ -15,10 +17,24 @@ import { HttpService } from '../../core-services/http.service';
 
 const CategoryRelations: RelationDefinition[] = [
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'parent_id',
         ownKey: 'parent',
         foreignModel: ViewCategory
+    },
+    {
+        type: 'O2M',
+        foreignIdKey: 'category_id',
+        ownKey: 'motions',
+        foreignModel: ViewMotion,
+        order: 'category_weight'
+    },
+    {
+        type: 'O2M',
+        foreignIdKey: 'parent_id',
+        ownKey: 'children',
+        foreignModel: ViewCategory,
+        order: 'weight'
     }
 ];
 
@@ -54,9 +70,19 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private httpService: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Category, CategoryRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            Category,
+            CategoryRelations
+        );
 
         this.setSortFunction((a, b) => a.weight - b.weight);
     }
@@ -98,14 +124,4 @@ export class CategoryRepositoryService extends BaseRepository<ViewCategory, Cate
     public async sortCategories(data: TreeIdNode[]): Promise<void> {
         await this.httpService.post('/rest/motions/category/sort_categories/', data);
     }
-
-    /**
-     * Filter the DataStore by Motions and returns the amount of motions in the given category
-     *
-     * @param category the category
-     * @returns the number of motions inside the category
-     */
-    public getMotionAmountByCategory(category: ViewCategory): number {
-        return this.DS.filter(Motion, motion => motion.category_id === category.id).length;
-    }
 }

client/src/app/core/repositories/motions/change-recommendation-repository.service.ts

@@ -7,6 +7,7 @@ import { map } from 'rxjs/operators';
 import { CollectionStringMapperService } from 'app/core/core-services/collection-string-mapper.service';
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { DataStoreService } from 'app/core/core-services/data-store.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { MotionChangeRecommendation } from 'app/shared/models/motions/motion-change-reco';
@@ -56,9 +57,18 @@ export class ChangeRecommendationRepositoryService extends BaseRepository<
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private diffService: DiffService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, MotionChangeRecommendation);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            MotionChangeRecommendation
+        );
     }
 
     public getTitle = (titleInformation: MotionChangeRecommendationTitleInformation) => {

client/src/app/core/repositories/motions/motion-block-repository.service.ts

@@ -1,21 +1,29 @@
 import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
-import { Observable } from 'rxjs';
-import { map } from 'rxjs/operators';
 
 import { CollectionStringMapperService } from 'app/core/core-services/collection-string-mapper.service';
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { DataStoreService } from 'app/core/core-services/data-store.service';
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
-import { Motion } from 'app/shared/models/motions/motion';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { MotionBlock } from 'app/shared/models/motions/motion-block';
 import { ViewMotion } from 'app/site/motions/models/view-motion';
 import { MotionBlockTitleInformation, ViewMotionBlock } from 'app/site/motions/models/view-motion-block';
 import { BaseIsAgendaItemAndListOfSpeakersContentObjectRepository } from '../base-is-agenda-item-and-list-of-speakers-content-object-repository';
 import { MotionRepositoryService } from './motion-repository.service';
 
+const MotionBlockRelations: RelationDefinition[] = [
+    {
+        type: 'O2M',
+        foreignIdKey: 'motion_block_id',
+        ownKey: 'motions',
+        foreignModel: ViewMotion
+    }
+];
+
 /**
  * Repository service for motion blocks
  */
@@ -42,10 +50,20 @@ export class MotionBlockRepositoryService extends BaseIsAgendaItemAndListOfSpeak
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private motionRepo: MotionRepositoryService,
         private httpService: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, MotionBlock);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            MotionBlock,
+            MotionBlockRelations
+        );
         this.initSorting();
     }
 
@@ -68,29 +86,6 @@ export class MotionBlockRepositoryService extends BaseIsAgendaItemAndListOfSpeak
         this.motionRepo.update(updateMotion, viewMotion);
     }
 
-    /**
-     * Filter the DataStore by Motions and returns the
-     *
-     * @param block the motion block
-     * @returns the number of motions inside a motion block
-     */
-    public getMotionAmountByBlock(block: MotionBlock): number {
-        return this.DS.filter(Motion, motion => motion.motion_block_id === block.id).length;
-    }
-
-    /**
-     * Observe the motion repository and return the motions belonging to the given
-     * block as observable
-     *
-     * @param block a motion block
-     * @returns an observable to view motions
-     */
-    public getViewMotionsByBlock(block: MotionBlock): Observable<ViewMotion[]> {
-        return this.motionRepo
-            .getViewModelListObservable()
-            .pipe(map(viewMotions => viewMotions.filter(viewMotion => viewMotion.motion_block_id === block.id)));
-    }
-
     /**
      * Retrieves motion blocks by name
      *

client/src/app/core/repositories/motions/motion-comment-section-repository.service.ts

@@ -3,7 +3,9 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { MotionCommentSection } from 'app/shared/models/motions/motion-comment-section';
 import { ViewMotion } from 'app/site/motions/models/view-motion';
 import {
@@ -11,7 +13,7 @@ import {
     ViewMotionCommentSection
 } from 'app/site/motions/models/view-motion-comment-section';
 import { ViewGroup } from 'app/site/users/models/view-group';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
@@ -65,6 +67,7 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private http: HttpService
     ) {
         super(
@@ -73,6 +76,7 @@ export class MotionCommentSectionRepositoryService extends BaseRepository<
             mapperService,
             viewModelStoreService,
             translate,
+            relationManager,
             MotionCommentSection,
             MotionCommentSectionRelations
         );

client/src/app/core/repositories/motions/motion-repository.service.ts

@@ -8,7 +8,9 @@ import { map } from 'rxjs/operators';
 import { DataStoreService } from 'app/core/core-services/data-store.service';
 import { HttpService } from 'app/core/core-services/http.service';
 import { OperatorService } from 'app/core/core-services/operator.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import { DiffLinesInParagraph, DiffService } from 'app/core/ui-services/diff.service';
 import { TreeIdNode } from 'app/core/ui-services/tree.service';
@@ -30,7 +32,6 @@ import { ViewTag } from 'app/site/tags/models/view-tag';
 import { ViewPersonalNote } from 'app/site/users/models/view-personal-note';
 import { ViewUser } from 'app/site/users/models/view-user';
 import { BaseIsAgendaItemAndListOfSpeakersContentObjectRepository } from '../base-is-agenda-item-and-list-of-speakers-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { LinenumberingService, LineNumberRange } from '../../ui-services/linenumbering.service';
@@ -69,31 +70,31 @@ export interface ParagraphToChoose {
 
 const MotionRelations: RelationDefinition[] = [
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'state_id',
         ownKey: 'state',
         foreignModel: ViewState
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'recommendation_id',
         ownKey: 'recommendation',
         foreignModel: ViewState
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'workflow_id',
         ownKey: 'workflow',
         foreignModel: ViewWorkflow
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'category_id',
         ownKey: 'category',
         foreignModel: ViewCategory
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'motion_block_id',
         ownKey: 'motion_block',
         foreignModel: ViewMotionBlock
@@ -105,7 +106,7 @@ const MotionRelations: RelationDefinition[] = [
         order: 'weight',
         relationDefinition: [
             {
-                type: 'O2M',
+                type: 'M2O',
                 ownIdKey: 'user_id',
                 ownKey: 'user',
                 foreignModel: ViewUser
@@ -131,7 +132,7 @@ const MotionRelations: RelationDefinition[] = [
         foreignModel: ViewTag
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'parent_id',
         ownKey: 'parent',
         foreignModel: ViewMotion
@@ -190,6 +191,7 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         config: ConfigService,
         private httpService: HttpService,
         private readonly sanitizer: DomSanitizer,
@@ -197,7 +199,7 @@ export class MotionRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCo
         private readonly diff: DiffService,
         private operator: OperatorService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Motion, MotionRelations);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Motion, MotionRelations);
         config.get<SortProperty>('motions_motions_sorting').subscribe(conf => {
             this.sortProperty = conf;
             this.setConfigSortFn();

client/src/app/core/repositories/motions/state-repository.service.ts

@@ -2,18 +2,20 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { State } from 'app/shared/models/motions/state';
 import { StateTitleInformation, ViewState } from 'app/site/motions/models/view-state';
 import { ViewWorkflow, WorkflowTitleInformation } from 'app/site/motions/models/view-workflow';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
 
 const StateRelations: RelationDefinition[] = [
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'workflow_id',
         ownKey: 'workflow',
         foreignModel: ViewWorkflow
@@ -54,9 +56,10 @@ export class StateRepositoryService extends BaseRepository<ViewState, State, Sta
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, State, StateRelations);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, State, StateRelations);
     }
 
     public getTitle = (titleInformation: WorkflowTitleInformation) => {

client/src/app/core/repositories/motions/statute-paragraph-repository.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { StatuteParagraph } from 'app/shared/models/motions/statute-paragraph';
 import { StatuteParagraphTitleInformation, ViewStatuteParagraph } from 'app/site/motions/models/view-statute-paragraph';
@@ -39,9 +40,10 @@ export class StatuteParagraphRepositoryService extends BaseRepository<
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, StatuteParagraph);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, StatuteParagraph);
     }
 
     public getTitle = (titleInformation: StatuteParagraphTitleInformation) => {

client/src/app/core/repositories/motions/workflow-repository.service.ts

@@ -2,12 +2,14 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { Workflow } from 'app/shared/models/motions/workflow';
 import { ViewMotion } from 'app/site/motions/models/view-motion';
 import { ViewState } from 'app/site/motions/models/view-state';
 import { ViewWorkflow, WorkflowTitleInformation } from 'app/site/motions/models/view-workflow';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
@@ -20,7 +22,7 @@ const WorkflowRelations: RelationDefinition[] = [
         foreignModel: ViewState
     },
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'first_state_id',
         ownKey: 'first_state',
         foreignModel: ViewState
@@ -55,9 +57,19 @@ export class WorkflowRepositoryService extends BaseRepository<ViewWorkflow, Work
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Workflow, WorkflowRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            Workflow,
+            WorkflowRelations
+        );
     }
 
     public getTitle = (titleInformation: WorkflowTitleInformation) => {

client/src/app/core/repositories/projector/countdown-repository.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ServertimeService } from 'app/core/core-services/servertime.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Countdown } from 'app/shared/models/core/countdown';
@@ -21,9 +22,10 @@ export class CountdownRepositoryService extends BaseRepository<ViewCountdown, Co
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private servertimeService: ServertimeService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Countdown);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Countdown);
     }
 
     public getTitle = (titleInformation: CountdownTitleInformation) => {

client/src/app/core/repositories/projector/projection-default-repository.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { ProjectionDefault } from 'app/shared/models/core/projection-default';
@@ -39,9 +40,10 @@ export class ProjectionDefaultRepositoryService extends BaseRepository<
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, ProjectionDefault);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, ProjectionDefault);
     }
 
     public getVerboseName = (plural: boolean = false) => {

client/src/app/core/repositories/projector/projector-message-repository.service.ts

@@ -3,6 +3,7 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { ProjectorMessage } from 'app/shared/models/core/projector-message';
 import {
@@ -26,9 +27,10 @@ export class ProjectorMessageRepositoryService extends BaseRepository<
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, ProjectorMessage);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, ProjectorMessage);
     }
 
     public getTitle = (titleInformation: ProjectorMessageTitleInformation) => {

client/src/app/core/repositories/projector/projector-repository.service.ts

@@ -3,11 +3,13 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { Projector } from 'app/shared/models/core/projector';
 import { ProjectorTitleInformation, ViewProjector } from 'app/site/projector/models/view-projector';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
@@ -23,7 +25,7 @@ export enum ScrollScaleDirection {
 
 const ProjectorRelations: RelationDefinition[] = [
     {
-        type: 'O2M',
+        type: 'M2O',
         ownIdKey: 'reference_projector_id',
         ownKey: 'referenceProjector',
         foreignModel: ViewProjector
@@ -51,9 +53,19 @@ export class ProjectorRepositoryService extends BaseRepository<ViewProjector, Pr
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private http: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Projector, ProjectorRelations);
+        super(
+            DS,
+            dataSend,
+            mapperService,
+            viewModelStoreService,
+            translate,
+            relationManager,
+            Projector,
+            ProjectorRelations
+        );
     }
 
     public getTitle = (titleInformation: ProjectorTitleInformation) => {

client/src/app/core/repositories/tags/tag-repository.service.ts

@@ -2,6 +2,7 @@ import { Injectable } from '@angular/core';
 
 import { TranslateService } from '@ngx-translate/core';
 
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Tag } from 'app/shared/models/core/tag';
 import { TagTitleInformation, ViewTag } from 'app/site/tags/models/view-tag';
@@ -38,9 +39,10 @@ export class TagRepositoryService extends BaseRepository<ViewTag, Tag, TagTitleI
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Tag);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Tag);
         this.initSorting();
     }
 

client/src/app/core/repositories/topics/topic-repository.service.ts

@@ -5,12 +5,13 @@ import { TranslateService } from '@ngx-translate/core';
 import { CollectionStringMapperService } from 'app/core/core-services/collection-string-mapper.service';
 import { DataSendService } from 'app/core/core-services/data-send.service';
 import { DataStoreService } from 'app/core/core-services/data-store.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { Topic } from 'app/shared/models/topics/topic';
 import { ViewMediafile } from 'app/site/mediafiles/models/view-mediafile';
 import { TopicTitleInformation, ViewTopic } from 'app/site/topics/models/view-topic';
 import { BaseIsAgendaItemAndListOfSpeakersContentObjectRepository } from '../base-is-agenda-item-and-list-of-speakers-content-object-repository';
-import { RelationDefinition } from '../base-repository';
 
 const TopicRelations: RelationDefinition[] = [
     {
@@ -44,9 +45,10 @@ export class TopicRepositoryService extends BaseIsAgendaItemAndListOfSpeakersCon
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Topic, TopicRelations);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Topic, TopicRelations);
     }
 
     public getTitle = (titleInformation: TopicTitleInformation) => {

client/src/app/core/repositories/users/group-repository.service.ts

@@ -3,6 +3,7 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Group } from 'app/shared/models/users/group';
 import { GroupTitleInformation, ViewGroup } from 'app/site/users/models/view-group';
@@ -55,10 +56,11 @@ export class GroupRepositoryService extends BaseRepository<ViewGroup, Group, Gro
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
         translate: TranslateService,
+        relationManager: RelationManagerService,
         private constantsService: ConstantsService,
         private http: HttpService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, Group);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, Group);
         this.sortPermsPerApp();
     }
 

client/src/app/core/repositories/users/personal-note-repository.service.ts

@@ -3,6 +3,7 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { DataSendService } from 'app/core/core-services/data-send.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
 import { Identifiable } from 'app/shared/models/base/identifiable';
 import { PersonalNote } from 'app/shared/models/users/personal-note';
@@ -30,9 +31,10 @@ export class PersonalNoteRepositoryService extends BaseRepository<
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
-        translate: TranslateService
+        translate: TranslateService,
+        relationManager: RelationManagerService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, PersonalNote);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, PersonalNote);
     }
 
     public getTitle = (titleInformation: PersonalNoteTitleInformation) => {

client/src/app/core/repositories/users/user-repository.service.ts

@@ -3,13 +3,15 @@ import { Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 
 import { HttpService } from 'app/core/core-services/http.service';
+import { RelationManagerService } from 'app/core/core-services/relation-manager.service';
 import { ViewModelStoreService } from 'app/core/core-services/view-model-store.service';
+import { RelationDefinition } from 'app/core/definitions/relations';
 import { NewEntry } from 'app/core/ui-services/base-import.service';
 import { ConfigService } from 'app/core/ui-services/config.service';
 import { User } from 'app/shared/models/users/user';
 import { ViewGroup } from 'app/site/users/models/view-group';
 import { UserTitleInformation, ViewUser } from 'app/site/users/models/view-user';
-import { BaseRepository, RelationDefinition } from '../base-repository';
+import { BaseRepository } from '../base-repository';
 import { CollectionStringMapperService } from '../../core-services/collection-string-mapper.service';
 import { DataSendService } from '../../core-services/data-send.service';
 import { DataStoreService } from '../../core-services/data-store.service';
@@ -61,11 +63,12 @@ export class UserRepositoryService extends BaseRepository<ViewUser, User, UserTi
         dataSend: DataSendService,
         mapperService: CollectionStringMapperService,
         viewModelStoreService: ViewModelStoreService,
+        relationManager: RelationManagerService,
         protected translate: TranslateService,
         private httpService: HttpService,
         private configService: ConfigService
     ) {
-        super(DS, dataSend, mapperService, viewModelStoreService, translate, User, UserRelations);
+        super(DS, dataSend, mapperService, viewModelStoreService, translate, relationManager, User, UserRelations);
         this.sortProperty = this.configService.instant('users_sort_by');
         this.configService.get<SortProperty>('users_sort_by').subscribe(conf => {
             this.sortProperty = conf;

client/src/app/shared/models/base/base-model-with-content-object.ts

@@ -6,4 +6,8 @@ import { ContentObject } from './content-object';
  */
 export abstract class BaseModelWithContentObject<T = object> extends BaseModel<T> {
     public abstract content_object: ContentObject;
+
+    public get contentObjectData(): ContentObject {
+        return this.content_object;
+    }
 }

client/src/app/site/agenda/agenda.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { ItemRepositoryService } from 'app/core/repositories/agenda/item-repository.service';
 import { ListOfSpeakersRepositoryService } from 'app/core/repositories/agenda/list-of-speakers-repository.service';
 import { ListOfSpeakers } from 'app/shared/models/agenda/list-of-speakers';

client/src/app/site/agenda/models/view-item.ts

@@ -12,6 +12,7 @@ export interface ItemTitleInformation {
 export class ViewItem extends BaseViewModelWithContentObject<Item, BaseViewModelWithAgendaItem>
     implements ItemTitleInformation {
     public static COLLECTIONSTRING = Item.COLLECTIONSTRING;
+    protected _collectionString = Item.COLLECTIONSTRING;
 
     public get item(): Item {
         return this._model;
@@ -83,8 +84,4 @@ export class ViewItem extends BaseViewModelWithContentObject<Item, BaseViewModel
     public get parent_id(): number {
         return this.item.parent_id;
     }
-
-    public constructor(item: Item) {
-        super(Item.COLLECTIONSTRING, item);
-    }
 }

client/src/app/site/agenda/models/view-list-of-speakers.ts

@@ -1,4 +1,3 @@
-import { Item } from 'app/shared/models/agenda/item';
 import { ListOfSpeakers } from 'app/shared/models/agenda/list-of-speakers';
 import { ContentObject } from 'app/shared/models/base/content-object';
 import { BaseViewModelWithContentObject } from 'app/site/base/base-view-model-with-content-object';
@@ -18,6 +17,7 @@ export interface ListOfSpeakersTitleInformation {
 export class ViewListOfSpeakers extends BaseViewModelWithContentObject<ListOfSpeakers, BaseViewModelWithListOfSpeakers>
     implements ListOfSpeakersTitleInformation, Projectable {
     public static COLLECTIONSTRING = ListOfSpeakers.COLLECTIONSTRING;
+    protected _collectionString = ListOfSpeakers.COLLECTIONSTRING;
 
     private _speakers?: ViewSpeaker[];
 
@@ -48,10 +48,6 @@ export class ViewListOfSpeakers extends BaseViewModelWithContentObject<ListOfSpe
         return `/agenda/speakers/${this.id}`;
     }
 
-    public constructor(listOfSpeakers: ListOfSpeakers) {
-        super(Item.COLLECTIONSTRING, listOfSpeakers);
-    }
-
     public getProjectorTitle(): string {
         return this.getTitle();
     }

client/src/app/site/agenda/models/view-speaker.ts

@@ -16,6 +16,8 @@ export enum SpeakerState {
  */
 export class ViewSpeaker extends BaseViewModel<Speaker> {
     public static COLLECTIONSTRING = Speaker.COLLECTIONSTRING;
+    protected _collectionString = Speaker.COLLECTIONSTRING;
+
     private _user?: ViewUser;
 
     public get speaker(): Speaker {
@@ -80,10 +82,6 @@ export class ViewSpeaker extends BaseViewModel<Speaker> {
         return this.user ? this.user.gender : '';
     }
 
-    public constructor(speaker: Speaker) {
-        super(Speaker.COLLECTIONSTRING, speaker);
-    }
-
     public getTitle = () => {
         return this.name;
     };

client/src/app/site/assignments/assignments.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { AssignmentRepositoryService } from 'app/core/repositories/assignments/assignment-repository.service';
 import { Assignment } from '../../shared/models/assignments/assignment';
 import { ViewAssignment } from './models/view-assignment';

client/src/app/site/assignments/models/view-assignment-poll-option.ts

@@ -10,6 +10,8 @@ const votesOrder: PollVoteValue[] = ['Votes', 'Yes', 'No', 'Abstain'];
 
 export class ViewAssignmentPollOption extends BaseViewModel<AssignmentPollOption> {
     public static COLLECTIONSTRING = AssignmentPollOption.COLLECTIONSTRING;
+    protected _collectionString = AssignmentPollOption.COLLECTIONSTRING;
+
     private _user?: ViewUser; // This is the "candidate". We'll stay consistent wich user here...
 
     public get option(): AssignmentPollOption {
@@ -49,8 +51,4 @@ export class ViewAssignmentPollOption extends BaseViewModel<AssignmentPollOption
     public get weight(): number {
         return this.option.weight;
     }
-
-    public constructor(assignmentPollOption: AssignmentPollOption) {
-        super(AssignmentPollOption.COLLECTIONSTRING, assignmentPollOption);
-    }
 }

client/src/app/site/assignments/models/view-assignment-poll.ts

@@ -7,6 +7,8 @@ import { ViewAssignmentPollOption } from './view-assignment-poll-option';
 
 export class ViewAssignmentPoll extends BaseProjectableViewModel<AssignmentPoll> {
     public static COLLECTIONSTRING = AssignmentPoll.COLLECTIONSTRING;
+    protected _collectionString = AssignmentPoll.COLLECTIONSTRING;
+
     private _options: ViewAssignmentPollOption[];
 
     public get poll(): AssignmentPoll {
@@ -76,10 +78,6 @@ export class ViewAssignmentPoll extends BaseProjectableViewModel<AssignmentPoll>
         return this.poll.assignment_id;
     }
 
-    public constructor(assignmentPoll: AssignmentPoll) {
-        super(AssignmentPoll.COLLECTIONSTRING, assignmentPoll);
-    }
-
     public getTitle = () => {
         return 'Poll';
     };

client/src/app/site/assignments/models/view-assignment-related-user.ts

@@ -4,6 +4,7 @@ import { ViewUser } from 'app/site/users/models/view-user';
 
 export class ViewAssignmentRelatedUser extends BaseViewModel<AssignmentRelatedUser> {
     public static COLLECTIONSTRING = AssignmentRelatedUser.COLLECTIONSTRING;
+    protected _collectionString = AssignmentRelatedUser.COLLECTIONSTRING;
 
     private _user?: ViewUser;
 
@@ -37,10 +38,6 @@ export class ViewAssignmentRelatedUser extends BaseViewModel<AssignmentRelatedUs
 
     public getListTitle: () => string = this.getTitle;
 
-    public constructor(assignmentRelatedUser: AssignmentRelatedUser) {
-        super(AssignmentRelatedUser.COLLECTIONSTRING, assignmentRelatedUser);
-    }
-
     public getTitle: () => string = () => {
         return this.user ? this.user.getFullName() : '';
     };

client/src/app/site/assignments/models/view-assignment.ts

@@ -39,6 +39,7 @@ export const AssignmentPhases: { name: string; value: number; display_name: stri
 export class ViewAssignment extends BaseViewModelWithAgendaItemAndListOfSpeakers<Assignment>
     implements AssignmentTitleInformation {
     public static COLLECTIONSTRING = Assignment.COLLECTIONSTRING;
+    protected _collectionString = Assignment.COLLECTIONSTRING;
 
     private _assignment_related_users?: ViewAssignmentRelatedUser[];
     private _polls?: ViewAssignmentPoll[];
@@ -125,10 +126,6 @@ export class ViewAssignment extends BaseViewModelWithAgendaItemAndListOfSpeakers
         return this._assignment_related_users ? this._assignment_related_users.length : 0;
     }
 
-    public constructor(assignment: Assignment) {
-        super(Assignment.COLLECTIONSTRING, assignment);
-    }
-
     public formatForSearch(): SearchRepresentation {
         return [this.title];
     }

client/src/app/site/base/base-view-model-with-agenda-item-and-list-of-speakers.ts

@@ -49,10 +49,6 @@ export abstract class BaseViewModelWithAgendaItemAndListOfSpeakers<
     public getListOfSpeakersTitle: () => string;
     public getListOfSpeakersSlideTitle: () => string;
 
-    public constructor(collectionString: string, model: M) {
-        super(collectionString, model);
-    }
-
     /**
      * @returns the (optional) descriptive text to be exported in the CSV.
      * May be overridden by inheriting classes

client/src/app/site/base/base-view-model-with-agenda-item.ts

@@ -85,8 +85,8 @@ export abstract class BaseViewModelWithAgendaItem<M extends BaseModelWithAgendaI
      */
     public getAgendaListTitle: () => string;
 
-    public constructor(collecitonString: string, model: M, item?: any) {
-        super(collecitonString, model);
+    public constructor(model: M, item?: any) {
+        super(model);
         this._item = item || null; // Explicit set to null instead of undefined, if not given
     }
 

client/src/app/site/base/base-view-model-with-content-object.ts

@@ -22,12 +22,4 @@ export abstract class BaseViewModelWithContentObject<
     public get contentObject(): C | null {
         return this._contentObject;
     }
-
-    /**
-     * @param collectionString The collection string of this model
-     * @param model the model this view model captures
-     */
-    public constructor(collectionString: string, model: M) {
-        super(collectionString, model);
-    }
 }

client/src/app/site/base/base-view-model-with-list-of-speakers.ts

@@ -49,8 +49,8 @@ export abstract class BaseViewModelWithListOfSpeakers<M extends BaseModelWithLis
     public getListOfSpeakersTitle: () => string;
     public getListOfSpeakersSlideTitle: () => string;
 
-    public constructor(collectionString: string, model: M, listOfSpeakers?: any) {
-        super(collectionString, model);
+    public constructor(model: M, listOfSpeakers?: any) {
+        super(model);
         this._list_of_speakers = listOfSpeakers || null; // Explicit set to null instead of undefined, if not given
     }
 

client/src/app/site/base/base-view-model.ts

@@ -14,8 +14,6 @@ export interface ViewModelConstructor<T extends BaseViewModel> {
  * Base class for view models. alls view models should have titles.
  */
 export abstract class BaseViewModel<M extends BaseModel = any> implements Displayable, Identifiable, Collection {
-    protected _model: M;
-
     public get id(): number {
         return this._model.id;
     }
@@ -58,10 +56,7 @@ export abstract class BaseViewModel<M extends BaseModel = any> implements Displa
      * @param collectionString
      * @param model
      */
-    public constructor(collectionString: string, model: M) {
-        this._collectionString = collectionString;
-        this._model = model;
-    }
+    public constructor(protected _model: M) {}
 
     /**
      * @returns the main underlying model of the view model

client/src/app/site/common/common.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 
 export const CommonAppConfig: AppConfig = {
     name: 'common',

client/src/app/site/config/config.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { Config } from '../../shared/models/core/config';
 import { ConfigRepositoryService } from '../../core/repositories/config/config-repository.service';
 import { ViewConfig } from './models/view-config';

client/src/app/site/config/models/view-config.ts

@@ -41,6 +41,7 @@ export interface ConfigTitleInformation {
  */
 export class ViewConfig extends BaseViewModel<Config> implements ConfigTitleInformation {
     public static COLLECTIONSTRING = Config.COLLECTIONSTRING;
+    protected _collectionString = Config.COLLECTIONSTRING;
 
     /* This private members are set by setConstantsInfo. */
     private _helpText: string;
@@ -90,10 +91,6 @@ export class ViewConfig extends BaseViewModel<Config> implements ConfigTitleInfo
         return this._defaultValue;
     }
 
-    public constructor(config: Config) {
-        super(Config.COLLECTIONSTRING, config);
-    }
-
     /**
      * Returns the time this config field needs to debounce before sending a request to the server.
      * A little debounce time for all inputs is given here and is usefull, if inputs sends multiple onChange-events,

client/src/app/site/history/history.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 
 /**
  * Config object for history.

client/src/app/site/mediafiles/mediafile.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { MediafileRepositoryService } from 'app/core/repositories/mediafiles/mediafile-repository.service';
 import { Mediafile } from '../../shared/models/mediafiles/mediafile';
 import { ViewMediafile } from './models/view-mediafile';

client/src/app/site/mediafiles/models/view-mediafile.ts

@@ -16,6 +16,7 @@ export interface MediafileTitleInformation {
 export class ViewMediafile extends BaseViewModelWithListOfSpeakers<Mediafile>
     implements MediafileTitleInformation, Searchable {
     public static COLLECTIONSTRING = Mediafile.COLLECTIONSTRING;
+    protected _collectionString = Mediafile.COLLECTIONSTRING;
 
     private _parent?: ViewMediafile;
     private _access_groups?: ViewGroup[];
@@ -101,10 +102,6 @@ export class ViewMediafile extends BaseViewModelWithListOfSpeakers<Mediafile>
         return this.mediafile.create_timestamp ? this.mediafile.create_timestamp : null;
     }
 
-    public constructor(mediafile: Mediafile) {
-        super(Mediafile.COLLECTIONSTRING, mediafile);
-    }
-
     public formatForSearch(): SearchRepresentation {
         return [this.title, this.path];
     }

client/src/app/site/motions/models/view-category.ts

@@ -2,6 +2,7 @@ import { SearchRepresentation } from 'app/core/ui-services/search.service';
 import { Category } from 'app/shared/models/motions/category';
 import { Searchable } from 'app/site/base/searchable';
 import { BaseViewModel } from '../../base/base-view-model';
+import { ViewMotion } from './view-motion';
 
 export interface CategoryTitleInformation {
     prefix: string;
@@ -17,8 +18,11 @@ export interface CategoryTitleInformation {
  */
 export class ViewCategory extends BaseViewModel<Category> implements CategoryTitleInformation, Searchable {
     public static COLLECTIONSTRING = Category.COLLECTIONSTRING;
+    protected _collectionString = Category.COLLECTIONSTRING;
 
     private _parent?: ViewCategory;
+    private _children?: ViewCategory[];
+    private _motions?: ViewMotion[];
 
     public get category(): Category {
         return this._model;
@@ -28,6 +32,14 @@ export class ViewCategory extends BaseViewModel<Category> implements CategoryTit
         return this._parent;
     }
 
+    public get children(): ViewCategory[] {
+        return this._children || [];
+    }
+
+    public get motions(): ViewMotion[] {
+        return this._motions || [];
+    }
+
     public get name(): string {
         return this.category.name;
     }
@@ -75,10 +87,6 @@ export class ViewCategory extends BaseViewModel<Category> implements CategoryTit
         }
     }
 
-    public constructor(category: Category) {
-        super(Category.COLLECTIONSTRING, category);
-    }
-
     public formatForSearch(): SearchRepresentation {
         return [this.name, this.prefix];
     }

client/src/app/site/motions/models/view-motion-block.ts

@@ -4,6 +4,7 @@ import { TitleInformationWithAgendaItem } from 'app/site/base/base-view-model-wi
 import { BaseViewModelWithAgendaItemAndListOfSpeakers } from 'app/site/base/base-view-model-with-agenda-item-and-list-of-speakers';
 import { ProjectorElementBuildDeskriptor } from 'app/site/base/projectable';
 import { Searchable } from 'app/site/base/searchable';
+import { ViewMotion } from './view-motion';
 
 export interface MotionBlockTitleInformation extends TitleInformationWithAgendaItem {
     title: string;
@@ -16,10 +17,16 @@ export interface MotionBlockTitleInformation extends TitleInformationWithAgendaI
 export class ViewMotionBlock extends BaseViewModelWithAgendaItemAndListOfSpeakers
     implements MotionBlockTitleInformation, Searchable {
     public static COLLECTIONSTRING = MotionBlock.COLLECTIONSTRING;
+    protected _collectionString = MotionBlock.COLLECTIONSTRING;
+
+    private _motions?: ViewMotion[];
 
     public get motionBlock(): MotionBlock {
         return this._model;
     }
+    public get motions(): ViewMotion[] {
+        return this._motions || [];
+    }
 
     public get title(): string {
         return this.motionBlock.title;
@@ -29,10 +36,6 @@ export class ViewMotionBlock extends BaseViewModelWithAgendaItemAndListOfSpeaker
         return this.motionBlock.internal;
     }
 
-    public constructor(motionBlock: MotionBlock) {
-        super(MotionBlock.COLLECTIONSTRING, motionBlock);
-    }
-
     /**
      * Formats the category for search
      *

client/src/app/site/motions/models/view-motion-change-recommendation.ts

@@ -15,15 +15,12 @@ export type MotionChangeRecommendationTitleInformation = object;
 export class ViewMotionChangeRecommendation extends BaseViewModel<MotionChangeRecommendation>
     implements MotionChangeRecommendationTitleInformation, ViewUnifiedChange {
     public static COLLECTIONSTRING = MotionChangeRecommendation.COLLECTIONSTRING;
+    protected _collectionString = MotionChangeRecommendation.COLLECTIONSTRING;
 
     public get changeRecommendation(): MotionChangeRecommendation {
         return this._model;
     }
 
-    public constructor(motionChangeRecommendation: MotionChangeRecommendation) {
-        super(MotionChangeRecommendation.COLLECTIONSTRING, motionChangeRecommendation);
-    }
-
     public updateChangeReco(type: number, text: string, internal: boolean): void {
         // @TODO HTML sanitazion
         this.changeRecommendation.type = type;

client/src/app/site/motions/models/view-motion-comment-section.ts

@@ -16,6 +16,7 @@ export interface MotionCommentSectionTitleInformation {
 export class ViewMotionCommentSection extends BaseViewModel<MotionCommentSection>
     implements MotionCommentSectionTitleInformation {
     public static COLLECTIONSTRING = MotionCommentSection.COLLECTIONSTRING;
+    protected _collectionString = MotionCommentSection.COLLECTIONSTRING;
 
     private _read_groups: ViewGroup[];
     private _write_groups: ViewGroup[];
@@ -59,10 +60,6 @@ export class ViewMotionCommentSection extends BaseViewModel<MotionCommentSection
         this._model.name = name;
     }
 
-    public constructor(motionCommentSection: MotionCommentSection) {
-        super(MotionCommentSection.COLLECTIONSTRING, motionCommentSection);
-    }
-
     /**
      * Updates the local objects if required
      * @param section

client/src/app/site/motions/models/view-motion.ts

@@ -62,6 +62,7 @@ export interface MotionTitleInformation extends TitleInformationWithAgendaItem {
 export class ViewMotion extends BaseViewModelWithAgendaItemAndListOfSpeakers<Motion>
     implements MotionTitleInformation, Searchable {
     public static COLLECTIONSTRING = Motion.COLLECTIONSTRING;
+    protected _collectionString = Motion.COLLECTIONSTRING;
 
     protected _category?: ViewCategory;
     protected _submitters?: ViewSubmitter[];
@@ -340,10 +341,6 @@ export class ViewMotion extends BaseViewModelWithAgendaItemAndListOfSpeakers<Mot
     // This is set by the repository
     public getIdentifierOrTitle: () => string;
 
-    public constructor(motion: Motion) {
-        super(Motion.COLLECTIONSTRING, motion);
-    }
-
     /**
      * Formats the category for search
      *

client/src/app/site/motions/models/view-state.ts

@@ -12,6 +12,7 @@ export interface StateTitleInformation {
  */
 export class ViewState extends BaseViewModel<State> implements StateTitleInformation {
     public static COLLECTIONSTRING = State.COLLECTIONSTRING;
+    protected _collectionString = State.COLLECTIONSTRING;
 
     private _next_states?: ViewState[];
     public _workflow?: ViewWorkflow;
@@ -92,8 +93,4 @@ export class ViewState extends BaseViewModel<State> implements StateTitleInforma
             return state.next_states_id.includes(this.id);
         });
     }
-
-    public constructor(state: State) {
-        super(State.COLLECTIONSTRING, state);
-    }
 }

client/src/app/site/motions/models/view-statute-paragraph.ts

@@ -17,6 +17,7 @@ export interface StatuteParagraphTitleInformation {
 export class ViewStatuteParagraph extends BaseViewModel<StatuteParagraph>
     implements StatuteParagraphTitleInformation, Searchable {
     public static COLLECTIONSTRING = StatuteParagraph.COLLECTIONSTRING;
+    protected _collectionString = StatuteParagraph.COLLECTIONSTRING;
 
     public get statuteParagraph(): StatuteParagraph {
         return this._model;
@@ -34,10 +35,6 @@ export class ViewStatuteParagraph extends BaseViewModel<StatuteParagraph>
         return this.statuteParagraph.weight;
     }
 
-    public constructor(statuteParagraph: StatuteParagraph) {
-        super(StatuteParagraph.COLLECTIONSTRING, statuteParagraph);
-    }
-
     public formatForSearch(): SearchRepresentation {
         return [this.title];
     }

client/src/app/site/motions/models/view-submitter.ts

@@ -4,6 +4,8 @@ import { ViewUser } from 'app/site/users/models/view-user';
 
 export class ViewSubmitter extends BaseViewModel<Submitter> {
     public static COLLECTIONSTRING = Submitter.COLLECTIONSTRING;
+    protected _collectionString = Submitter.COLLECTIONSTRING;
+
     private _user?: ViewUser;
 
     public get submitter(): Submitter {
@@ -30,10 +32,6 @@ export class ViewSubmitter extends BaseViewModel<Submitter> {
         return this.submitter.weight;
     }
 
-    public constructor(submitter: Submitter) {
-        super(Submitter.COLLECTIONSTRING, submitter);
-    }
-
     public getTitle = () => {
         return this.user ? this.user.getTitle() : '';
     };

client/src/app/site/motions/models/view-workflow.ts

@@ -12,6 +12,7 @@ export interface WorkflowTitleInformation {
  */
 export class ViewWorkflow extends BaseViewModel<Workflow> implements WorkflowTitleInformation {
     public static COLLECTIONSTRING = Workflow.COLLECTIONSTRING;
+    protected _collectionString = Workflow.COLLECTIONSTRING;
 
     private _states?: ViewState[];
     private _first_state?: ViewState;
@@ -39,8 +40,4 @@ export class ViewWorkflow extends BaseViewModel<Workflow> implements WorkflowTit
     public get first_state(): ViewState | null {
         return this._first_state;
     }
-
-    public constructor(workflow: Workflow) {
-        super(Workflow.COLLECTIONSTRING, workflow);
-    }
 }

client/src/app/site/motions/modules/category/components/category-detail/category-detail.component.ts

@@ -107,7 +107,7 @@ export class CategoryDetailComponent extends BaseViewComponent implements OnInit
                     return;
                 }
 
-                // Find index of last child. THis can be easily done by searching, becuase this
+                // Find index of last child. This can be easily done by searching, because this
                 // is the flat sorted tree
                 this.selectedCategory = categories[selectedCategoryIndex];
                 super.setTitle(this.selectedCategory.prefixedName);
@@ -122,24 +122,10 @@ export class CategoryDetailComponent extends BaseViewComponent implements OnInit
                 this.categories = categories.slice(selectedCategoryIndex, lastChildIndex);
 
                 // setup datasources:
-                const allMotions = this.motionRepo
-                    .getViewModelList()
-                    .sort((a, b) => a.category_weight - b.category_weight);
                 this.categories.forEach(category => {
-                    if (!this.dataSources[category.id]) {
-                        const dataSource = new MatTableDataSource<ViewMotion>();
-                        dataSource.data = allMotions.filter(motion => motion.category_id === category.id);
-                        this.dataSources[category.id] = dataSource;
-                    }
-                });
-            }),
-            this.motionRepo.getViewModelListObservable().subscribe(motions => {
-                motions = motions
-                    .filter(motion => !!motion.category_id)
-                    .sort((a, b) => a.category_weight - b.category_weight);
-                Object.keys(this.dataSources).forEach(_id => {
-                    const id = +_id;
-                    this.dataSources[id].data = motions.filter(motion => motion.category_id === id);
+                    const dataSource = new MatTableDataSource<ViewMotion>();
+                    dataSource.data = category.motions;
+                    this.dataSources[category.id] = dataSource;
                 });
             })
         );

client/src/app/site/motions/modules/category/components/category-list/category-list.component.html

@@ -66,7 +66,7 @@
                 <span translate>Motions</span>
             </mat-header-cell>
             <mat-cell *matCellDef="let category">
-                <span class="os-amount-chip">{{ getMotionAmount(category) }}</span>
+                <span class="os-amount-chip">{{ category.motions.length }}</span>
             </mat-cell>
         </ng-container>
 

client/src/app/site/motions/modules/category/components/category-list/category-list.component.ts

@@ -95,16 +95,6 @@ export class CategoryListComponent extends BaseViewComponent implements OnInit {
         return ['title', 'amount', 'anchor'];
     }
 
-    /**
-     * return the amount of motions in a category
-     *
-     * @param category the category to determine the amount of motions for
-     * @returns a number that indicates how many motions are in the given category
-     */
-    public getMotionAmount(category: ViewCategory): number {
-        return this.repo.getMotionAmountByCategory(category);
-    }
-
     /**
      * Click handler for the plus button
      */

client/src/app/site/motions/modules/motion-block/components/motion-block-detail/motion-block-detail.component.ts

@@ -132,7 +132,7 @@ export class MotionBlockDetailComponent extends BaseViewComponent implements OnI
 
                     this.dataSource = createDS<ViewMotion>()
                         .onTrigger(() => {
-                            return this.repo.getViewMotionsByBlock(this.block.motionBlock);
+                            return this.block.motions;
                         })
                         .create();
                 }

client/src/app/site/motions/modules/motion-block/components/motion-block-list/motion-block-list.component.html

@@ -15,22 +15,22 @@
         (dataSourceChange)="onDataSourceChange($event)"
     >
         <!-- Title column -->
-        <div *pblNgridCellDef="'title'; value as title; row as block; rowContext as rowContext" class="cell-slot fill">
+        <div *pblNgridCellDef="'title'; value as title; row as motionBlock; rowContext as rowContext" class="cell-slot fill">
             <a
                 class="detail-link"
                 (click)="saveScrollIndex('motionBlock', rowContext.identity)"
-                [routerLink]="block.id"
+                [routerLink]="motionBlock.id"
                 *ngIf="!isMultiSelect"
             ></a>
             <div>
-                <mat-icon matTooltip="Internal" *ngIf="block.internal">lock</mat-icon>
+                <mat-icon matTooltip="Internal" *ngIf="motionBlock.internal">lock</mat-icon>
                 {{ title }}
             </div>
         </div>
 
         <!-- Amount -->
-        <div *pblNgridCellDef="'amount'; row as block" class="cell-slot fill">
-            <span class="os-amount-chip">{{ getMotionAmount(block.motionBlock) }}</span>
+        <div *pblNgridCellDef="'amount'; row as motionBlock" class="cell-slot fill">
+            <span class="os-amount-chip">{{ motionBlock.motions.length }}</span>
         </div>
     </os-list-view-table>
 </mat-card>

client/src/app/site/motions/modules/motion-block/components/motion-block-list/motion-block-list.component.ts

@@ -12,7 +12,6 @@ import { OperatorService } from 'app/core/core-services/operator.service';
 import { StorageService } from 'app/core/core-services/storage.service';
 import { ItemRepositoryService } from 'app/core/repositories/agenda/item-repository.service';
 import { MotionBlockRepositoryService } from 'app/core/repositories/motions/motion-block-repository.service';
-import { MotionBlock } from 'app/shared/models/motions/motion-block';
 import { infoDialogSettings } from 'app/shared/utils/dialog-settings';
 import { ViewItem } from 'app/site/agenda/models/view-item';
 import { BaseListViewComponent } from 'app/site/base/base-list-view';
@@ -117,16 +116,6 @@ export class MotionBlockListComponent extends BaseListViewComponent<ViewMotionBl
         this.items = this.itemRepo.getViewModelListBehaviorSubject();
     }
 
-    /**
-     * return the amount of motions in a motion block
-     *
-     * @param motionBlock the block to determine the amount of motions for
-     * @returns a number that indicates how many motions are in the given block
-     */
-    public getMotionAmount(motionBlock: MotionBlock): number {
-        return this.repo.getMotionAmountByBlock(motionBlock);
-    }
-
     /**
      * Helper function reset the form and set the default values
      */

client/src/app/site/motions/motions.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { CategoryRepositoryService } from 'app/core/repositories/motions/category-repository.service';
 import { ChangeRecommendationRepositoryService } from 'app/core/repositories/motions/change-recommendation-repository.service';
 import { MotionBlockRepositoryService } from 'app/core/repositories/motions/motion-block-repository.service';

client/src/app/site/motions/services/motion-sort-list.service.ts

@@ -4,7 +4,7 @@ import { TranslateService } from '@ngx-translate/core';
 
 import { OpenSlidesStatusService } from 'app/core/core-services/openslides-status.service';
 import { StorageService } from 'app/core/core-services/storage.service';
-import { Deferred } from 'app/core/deferred';
+import { Deferred } from 'app/core/promises/deferred';
 import { _ } from 'app/core/translate/translation-marker';
 import { BaseSortListService, OsSortingDefinition, OsSortingOption } from 'app/core/ui-services/base-sort-list.service';
 import { ConfigService } from 'app/core/ui-services/config.service';

client/src/app/site/projector/models/view-countdown.ts

@@ -9,6 +9,7 @@ export interface CountdownTitleInformation {
 
 export class ViewCountdown extends BaseProjectableViewModel<Countdown> implements CountdownTitleInformation {
     public static COLLECTIONSTRING = Countdown.COLLECTIONSTRING;
+    protected _collectionString = Countdown.COLLECTIONSTRING;
 
     public get countdown(): Countdown {
         return this._model;
@@ -34,10 +35,6 @@ export class ViewCountdown extends BaseProjectableViewModel<Countdown> implement
         return this.countdown.title;
     }
 
-    public constructor(countdown: Countdown) {
-        super(Countdown.COLLECTIONSTRING, countdown);
-    }
-
     public getSlide(): ProjectorElementBuildDeskriptor {
         return {
             getBasicProjectorElement: options => ({

client/src/app/site/projector/models/view-projection-default.ts

@@ -8,6 +8,7 @@ export interface ProjectionDefaultTitleInformation {
 export class ViewProjectionDefault extends BaseViewModel<ProjectionDefault>
     implements ProjectionDefaultTitleInformation {
     public static COLLECTIONSTRING = ProjectionDefault.COLLECTIONSTRING;
+    protected _collectionString = ProjectionDefault.COLLECTIONSTRING;
 
     public get projectionDefault(): ProjectionDefault {
         return this._model;
@@ -24,8 +25,4 @@ export class ViewProjectionDefault extends BaseViewModel<ProjectionDefault>
     public get display_name(): string {
         return this.projectionDefault.display_name;
     }
-
-    public constructor(projectionDefault: ProjectionDefault) {
-        super(ProjectionDefault.COLLECTIONSTRING, projectionDefault);
-    }
 }

client/src/app/site/projector/models/view-projector-message.ts

@@ -8,6 +8,7 @@ export type ProjectorMessageTitleInformation = object;
 export class ViewProjectorMessage extends BaseProjectableViewModel<ProjectorMessage>
     implements ProjectorMessageTitleInformation {
     public static COLLECTIONSTRING = ProjectorMessage.COLLECTIONSTRING;
+    protected _collectionString = ProjectorMessage.COLLECTIONSTRING;
 
     public get projectormessage(): ProjectorMessage {
         return this._model;
@@ -17,10 +18,6 @@ export class ViewProjectorMessage extends BaseProjectableViewModel<ProjectorMess
         return this.projectormessage.message;
     }
 
-    public constructor(projectorMessage: ProjectorMessage) {
-        super(ProjectorMessage.COLLECTIONSTRING, projectorMessage);
-    }
-
     public getSlide(): ProjectorElementBuildDeskriptor {
         return {
             getBasicProjectorElement: options => ({

client/src/app/site/projector/models/view-projector.ts

@@ -7,6 +7,7 @@ export interface ProjectorTitleInformation {
 
 export class ViewProjector extends BaseViewModel<Projector> {
     public static COLLECTIONSTRING = Projector.COLLECTIONSTRING;
+    protected _collectionString = Projector.COLLECTIONSTRING;
 
     private _referenceProjector: ViewProjector;
 
@@ -105,8 +106,4 @@ export class ViewProjector extends BaseViewModel<Projector> {
     public get show_logo(): boolean {
         return this.projector.show_logo;
     }
-
-    public constructor(projector: Projector) {
-        super(Projector.COLLECTIONSTRING, projector);
-    }
 }

client/src/app/site/projector/projector.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { CountdownRepositoryService } from 'app/core/repositories/projector/countdown-repository.service';
 import { ProjectionDefaultRepositoryService } from 'app/core/repositories/projector/projection-default-repository.service';
 import { ProjectorMessageRepositoryService } from 'app/core/repositories/projector/projector-message-repository.service';

client/src/app/site/tags/models/view-tag.ts

@@ -16,6 +16,7 @@ export interface TagTitleInformation {
  */
 export class ViewTag extends BaseViewModel<Tag> implements TagTitleInformation, Searchable {
     public static COLLECTIONSTRING = Tag.COLLECTIONSTRING;
+    protected _collectionString = Tag.COLLECTIONSTRING;
 
     public get tag(): Tag {
         return this._model;
@@ -25,10 +26,6 @@ export class ViewTag extends BaseViewModel<Tag> implements TagTitleInformation,
         return this.tag.name;
     }
 
-    public constructor(tag: Tag) {
-        super(Tag.COLLECTIONSTRING, tag);
-    }
-
     public formatForSearch(): SearchRepresentation {
         return [this.name];
     }

client/src/app/site/tags/tag.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { TagRepositoryService } from 'app/core/repositories/tags/tag-repository.service';
 import { Tag } from '../../shared/models/core/tag';
 import { ViewTag } from './models/view-tag';

client/src/app/site/topics/models/view-topic.ts

@@ -16,6 +16,7 @@ export interface TopicTitleInformation extends TitleInformationWithAgendaItem {
  */
 export class ViewTopic extends BaseViewModelWithAgendaItemAndListOfSpeakers implements TopicTitleInformation {
     public static COLLECTIONSTRING = Topic.COLLECTIONSTRING;
+    protected _collectionString = Topic.COLLECTIONSTRING;
 
     private _attachments?: ViewMediafile[];
 
@@ -39,10 +40,6 @@ export class ViewTopic extends BaseViewModelWithAgendaItemAndListOfSpeakers impl
         return this.topic.text;
     }
 
-    public constructor(topic: Topic) {
-        super(Topic.COLLECTIONSTRING, topic);
-    }
-
     /**
      * Formats the category for search
      *

client/src/app/site/topics/topics.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { TopicRepositoryService } from 'app/core/repositories/topics/topic-repository.service';
 import { Topic } from '../../shared/models/topics/topic';
 import { ViewTopic } from './models/view-topic';

client/src/app/site/users/models/view-group.ts

@@ -7,6 +7,7 @@ export interface GroupTitleInformation {
 
 export class ViewGroup extends BaseViewModel<Group> implements GroupTitleInformation {
     public static COLLECTIONSTRING = Group.COLLECTIONSTRING;
+    protected _collectionString = Group.COLLECTIONSTRING;
 
     public get group(): Group {
         return this._model;
@@ -29,10 +30,6 @@ export class ViewGroup extends BaseViewModel<Group> implements GroupTitleInforma
         return this.group.permissions;
     }
 
-    public constructor(group?: Group) {
-        super(Group.COLLECTIONSTRING, group);
-    }
-
     public hasPermission(perm: string): boolean {
         return this.permissions.includes(perm);
     }

client/src/app/site/users/models/view-personal-note.ts

@@ -5,6 +5,7 @@ export type PersonalNoteTitleInformation = object;
 
 export class ViewPersonalNote extends BaseViewModel<PersonalNote> implements PersonalNoteTitleInformation {
     public static COLLECTIONSTRING = PersonalNote.COLLECTIONSTRING;
+    protected _collectionString = PersonalNote.COLLECTIONSTRING;
 
     public get personalNote(): PersonalNote {
         return this._model;
@@ -18,10 +19,6 @@ export class ViewPersonalNote extends BaseViewModel<PersonalNote> implements Per
         return this.personalNote.notes;
     }
 
-    public constructor(personalNote: PersonalNote) {
-        super(PersonalNote.COLLECTIONSTRING, personalNote);
-    }
-
     public getNoteContent(collection: string, id: number): PersonalNoteContent | null {
         if (this.notes[collection]) {
             return this.notes[collection][id];

client/src/app/site/users/models/view-user.ts

@@ -16,6 +16,7 @@ export interface UserTitleInformation {
 
 export class ViewUser extends BaseProjectableViewModel<User> implements UserTitleInformation, Searchable {
     public static COLLECTIONSTRING = User.COLLECTIONSTRING;
+    protected _collectionString = User.COLLECTIONSTRING;
 
     private _groups: ViewGroup[];
 
@@ -120,10 +121,6 @@ export class ViewUser extends BaseProjectableViewModel<User> implements UserTitl
     public getFullName: () => string;
     public getShortName: () => string;
 
-    public constructor(user: User) {
-        super(User.COLLECTIONSTRING, user);
-    }
-
     /**
      * Formats the category for search
      *

client/src/app/site/users/users.config.ts

@@ -1,4 +1,4 @@
-import { AppConfig } from '../../core/app-config';
+import { AppConfig } from '../../core/definitions/app-config';
 import { GroupRepositoryService } from 'app/core/repositories/users/group-repository.service';
 import { PersonalNoteRepositoryService } from 'app/core/repositories/users/personal-note-repository.service';
 import { UserRepositoryService } from 'app/core/repositories/users/user-repository.service';