More complete datastore interface
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FinnStutzenstein
parent
c187700af2
commit
f7f70098b0
@ -3,7 +3,6 @@
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Enum EventType {
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Create,
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Update,
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DeleteField,
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Delete,
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Restore,
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}
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@ -11,16 +10,49 @@ Enum EventType {
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Exception ModelDoesNotExist(model: Fqid);
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Exception ModelExist(model: Fqid);
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Exception ModelNotDeleted(model: Fqid);
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Exception ModelLocked(model: Fqid | CollectionField);
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Exception InvalidFormat();
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Exception ModelLocked(key: Fqid | Fqfield | CollectionField);
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Exception InvalidFormat(msg: string);
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Exception InvalidRequest(msg: string);
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// TODO:
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Exception MeetingIdNotSpecified();
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# Note: Error returns via HTTP 400:
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Interface ErrorResponse {
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error: InvalidFormatData |
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InvalidRequestData |
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ModelDoesNotExistData |
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ModelExistData |
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ModelMotDeletedData |
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ModelLockedData;
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}
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Interface InvalidFormatData {
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type: 1;
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msg: string;
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}
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Interface InvalidRequestData {
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type: 2;
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msg: string;
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Interface ModelDoesNotExistData {
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type: 3;
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fqid: string;
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}
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Interface ModelExistData {
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type: 4;
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fqid: string;
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}
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Interface ModelNotDeletedData {
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type: 5;
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fqid: string;
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}
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Interface ModelLockedData {
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type: 6;
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key: string;
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}
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## Writer
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# Note: Different host and port than the reader!
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/**
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* Writes Events into the datastore
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* Writes Events into the datastore.
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* Url: POST to /datastore/writer/write
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*
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* @throws ModelDoesNotExist
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* @throws ModelExists
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@ -28,7 +60,7 @@ Exception MeetingIdNotSpecified();
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* @throws InvalidFormat
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* @throws ModelNotDeleted
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*/
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write(request: WriteRequest): void publishes BulkMetadataUpdate
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write(request: WriteRequest): void publishes ModifiedFieldsEvent
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Interface WriteRequest {
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events: (CreateEvent | RestoreEvent | UpdateEvent | DeleteEvent)[];
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@ -38,54 +70,71 @@ Interface WriteRequest {
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user_id: number;
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locked_fields: {
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<fqid>: Position;
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<fqfield>: Position;
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<CollectionField>: Position;
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}
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}
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Interface CreateEvent {
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type: 'create';
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fqid: Fqid;
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data: {
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fields: {
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<field>: Value;
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}
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}
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// Note: For deleting keys, they must be set to `None`. These keys
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// will be removed from the model.
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Interface UpdateEvent {
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fqfields: {
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<fqfield>: Value;
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type: 'update';
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fqid: Fqid;
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fields: {
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<field>: Value;
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}
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}
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Interface RestoreEvent {
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type: 'restore';
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fqid: Fqid;
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}
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Interface DeleteEvent {
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type: 'delete';
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fqid: Fqid;
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}
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Event FieldUpdatedEvent on topic FieldUpdatedTopic {
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created: Fqid[];
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deleted: Fqid[];
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updated: Fqfield[];
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// Note: The modified fqfields include:
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// - all updated fqfields
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// - all deleted fqfields
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// - all fqfields of all deleted models
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// - all fqfields of all created models
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// - all fqfields of all restored models (logically the same as created)
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Event ModifiedFieldsEvent on topic ModifiedFields {
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modified: Fqfield[];
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}
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## Reader
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/**
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* Gibt n sequentielle Ids für die gegebene Collection zurück.
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* Url: POST to /datastore/writer/get_ids
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*/
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getIds(collection: Collection, n: number): Id[]
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/** Common Parameters:
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* - position: Optionsl, if given reads the data to this position.
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* - mapped_fields: List of fields, that should onl be present in the response.
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* TODO:
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* - meeting_id: Für Modelle außer Nutzer, Gremium, Veranstaltung und Config
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* Ist eine Angabe verpflichtend. Dies beschränkt die Nutzung
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* auf eine spezifische Veranstaltung.
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*
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* Alle Operationen fügen `meta:position` und `meta:deleted` an.
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## Reader
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# Note: Different host and port than the writer!
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/** Common notes:
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* - parameter `position`: Optional, if given reads the data to this position.
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* - parameter `mapped_fields`: List of fields, that should onl be present in the response.
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* - All operations adds the fields `meta_position` and `meta_deleted` to the models.
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* - The InvalidFormat exception can always be thrown, if the requested formats are
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* wrong, including something like empty collections, ...
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*/
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/**
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* Returns a model. Deleted models are not returned (and handled as a ModelDiesNotExit)
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* Returns a model. Deleted models are not returned (and handled as a ModelDoesNotExit)
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*
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* @throws ModelDoesNotExist
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* @throws InvalidFormat
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*/
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get(model: Fqid, position?: Position, mapped_fields?: fields[]): Partial<Model>;
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@ -93,83 +142,90 @@ get(model: Fqid, position?: Position, mapped_fields?: fields[]): Partial<Model>;
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* Analogous to `get`, but also finds deleted models (see `meta_deleted` in the model)
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*
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* @throws ModelDoesNotExist
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* @throws InvalidFormat
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*/
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getWithDeleted(model: Fqid, position?: Position, mapped_fields?: Field[]): Partial<Model>;
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/**
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* Gibt mehrere Modellinstanzen aus dem Eventstore zur aktuellen Position
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* zurück. Gelöschte Instanzen werden nicht zurückgegeben.
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*
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* @throws ModelDoesNotExist
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* Returns multiple (non-deleted) models of a collection. If one id is not found, it is
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* not included in the response instead of throwing a ModelDoesNotExist.
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*/
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getMany(collection: Collection, ids: Id[], position?: Position, mapped_fields?: Field[]): Partial<Model>[];
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/**
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* Analog zu `getMany`, gibt jedoch auch gelöschte Instanzen zurück.
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* Analogous to `getMany`, but includes deleted instances.
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*
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* @throws ModelDoesNotExist
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* @throws InvalidFormat
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*/
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getManyWithDeleted(collection: Collection, ids: Id[], position?: Position, mapped_fields?: Field[]): Partial<Model>[];
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// Shortcuts for `filter*` without a filter
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/**
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* Gibt alle Modelle einer Collection zurück. Die Veranstaltungsid ist zwingend (s.o.)
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* für einige Collections. Gibt keine gelöscheten Elemente aus.
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*
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* @throws MeetingIdNotSpecified()
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* Returns all (non-deleted) modells of one collection. It is not possible to specify
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* an id, so this method can not be used, if the user browses the history. It should
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* be noted, that it is highly disencouraged to use this method, becuase it might
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* return a huge amount of data.
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*/
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getAll(collection: Collection, meeting_id?: Id, position?: Position, mapped_fields?: Field[]): Partial<Model>[];
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getAll(collection: Collection, mapped_fields?: Field[]): Partial<Model>[];
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/**
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* Wie `getAll`, gibt gelöschte und nicht-gelöschte Modelle wieder.
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* Like `getAll`, but with deleted models included.
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*
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* @throws MeetingIdNotSpecified()
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* @throws InvalidFormat
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*/
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getAllWithDeleted(collection: Collection, meeting_id?: Id, position?: Position, mapped_fields?: Field[]): Partial<Model>[];
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getAllWithDeleted(collection: Collection, meeting_id?: Id, mapped_fields?: Field[]): Partial<Model>[];
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/**
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* Wie `getAll`, gibt jedoch nur gelöschte Modelle wieder.
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* Like `getAll`, but returns only all deleted models.
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*
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* @throws MeetingIdNotSpecified()
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* @throws InvalidFormat
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*/
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getAllOnlyDeleted(collection: Collection, meeting_id?: Id, position?: Position, mapped_fields?: Field[]): Partial<Model>[];
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getAllOnlyDeleted(collection: Collection, meeting_id?: Id, mapped_fields?: Field[]): Partial<Model>[];
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/**
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* Gibt alle Modelle einer Collection (möglicherweise Veranstaltungsspezifisch)
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* wieder, die dem filter-Ausdruck genügen. Für Filtermöglichkeiten: siehe unten.
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* Returns all models of one collection, that satisifes the filter condition. This method
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* does not take a position and can not be used when browsing the history.
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*
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* @throws MeetingIdNotSpecified()
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* @throws InvalidFormat
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*/
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filter(collection: Collection, meeting_id?: Id, filter: Filter, position?: Position, mapped_fields?: Field[]): Partial<Model>[]
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filter(collection: Collection, filter: Filter, mapped_fields?: Field[]): Partial<Model>[]
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/**
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* Siehe `filter`. Gibt zurück, ob mindestens ein Modell gefunden wurde.
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* See `filter`, returns true, if at least one model was found. The returned position is
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* the highest position in the complete datastore.
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*
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* @throws MeetingIdNotSpecified()
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* @throws InvalidFormat
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*/
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exists(collection: Collection, meeting_id?: Id, filter: Filter, position?: Position): {exists: boolean; position: Position;}
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exists(collection: Collection, filter: Filter): {exists: boolean; position: Position;}
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/**
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* Siehe `filter`. Gibt die Anzahl an Modellen zurück.
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* See `filter`, returns the amount of found models. The returned position is
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* the highest position in the complete datastore.
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*
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* @throws MeetingIdNotSpecified()
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* @throws InvalidFormat
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*/
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count(collection: Collection, meeting_id?: Id, filter: Filter, position?: Position): {count: number; position: Position;}
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count(collection: Collection, filter: Filter): {count: number; position: Position;}
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/**
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* Führt einfache Min-Max-Aggregation über numerische Felder aus.
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* Executes a min aggregation about all models of one collection, that
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* satisfy the filter condition.
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*
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* @throws MeetingIdNotSpecified()
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* @throws AggregationOperationInvalid(operand, value)
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* @throws InvalidFormat
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*/
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aggregate(collection: Collection, meeting_id?: Id, filter: Filter, aggregate: Aggregate, position?: Position): Value
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min(collection: Collection, filter: Filter): {min: Value; position: Position;}
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/**
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* Executes a max aggregation about all models of one collection, that
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* satisfy the filter condition.
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*
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* @throws InvalidFormat
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*/
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max(collection: Collection, filter: Filter): {min: Value; position: Position;}
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Type Filter = And | Or | Not | FilterOperator
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/**
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* Das eigentliche Filter-predikat. M[field] ist der Wert des Feldes des
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* betrachteten Modells. Für alle Operatoren ist das
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* Prädikat wahr, wenn `M[field] <op> value` wahr ist.
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* The filter predicate. M[field] states the value of the field of a model M.
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* For all operations the predicate if true, if `M[field] <op> value` is true.
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*/
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Interface FilterOperator {
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field: Field;
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@ -188,13 +244,3 @@ Interface And {
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Interface Or {
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or: Filter[];
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}
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Interface Aggregate {
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field: Field;
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type: 'min' | 'max';
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}
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/**
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* Gibt n sequentielle Ids für die gegebene Collection zurück.
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*/
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getId(collection: Collection, n: number): Id
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