Unproject elements when they are deleted. Fixed #3292.

CHANGELOG

@@ -62,6 +62,7 @@ Core:
 - Highlight list entries in a light blue, if a related object is projected
   (e. g. a list of speakers of a motion) [#3301].
 - Select the projector resolution with a slider and an aspect ratio [#3311].
+- Fixed bug the elements are projected and the deleted [#3336].
 - Delay the 'could not load projector' error 3 seconds to not irritate users
   with a slow internet connection [#3323].
 - Added config value for standard font size in PDF [#3332].

openslides/agenda/models.py

@@ -10,7 +10,7 @@ from django.utils.translation import ugettext as _
 from django.utils.translation import ugettext_lazy
 
 from openslides.core.config import config
-from openslides.core.models import Countdown
+from openslides.core.models import Countdown, Projector
 from openslides.utils.exceptions import OpenSlidesError
 from openslides.utils.models import RESTModelMixin
 from openslides.utils.utils import to_roman
@@ -284,6 +284,17 @@ class Item(RESTModelMixin, models.Model):
     def __str__(self):
         return self.title
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete an agenda item. Ensures that a respective
+        list of speakers projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='agenda/list-of-speakers',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     @property
     def title(self):
         """

openslides/agenda/signals.py

@@ -34,6 +34,8 @@ def listen_to_related_object_post_delete(sender, instance, **kwargs):
     if hasattr(instance, 'get_agenda_title'):
         content_type = ContentType.objects.get_for_model(instance)
         try:
+            # Attention: This delete() call is also necessary to remove
+            # respective active list of speakers projector elements.
             Item.objects.get(object_id=instance.pk, content_type=content_type).delete()
         except Item.DoesNotExist:
             # Item does not exist so we do not have to delete it.

openslides/assignments/models.py

@@ -8,7 +8,7 @@ from django.utils.translation import ugettext_noop
 
 from openslides.agenda.models import Item, Speaker
 from openslides.core.config import config
-from openslides.core.models import Tag
+from openslides.core.models import Projector, Tag
 from openslides.poll.models import (
     BaseOption,
     BasePoll,
@@ -165,14 +165,16 @@ class Assignment(RESTModelMixin, models.Model):
     def __str__(self):
         return self.title
 
-    def get_slide_context(self, **context):
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
         """
-        Retuns the context to generate the assignment slide.
+        Customized method to delete an assignment. Ensures that a respective
+        assignment projector element is disabled.
         """
-        return super().get_slide_context(
+        Projector.remove_any(
-            polls=self.polls.filter(published=True),
+            skip_autoupdate=skip_autoupdate,
-            vote_results=self.vote_results(only_published=True),
+            name='assignments/assignment',
-            **context)
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
 
     @property
     def candidates(self):
@@ -415,6 +417,18 @@ class AssignmentPoll(RESTModelMixin, CollectDefaultVotesMixin,
     class Meta:
         default_permissions = ()
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete an assignment poll. Ensures that a respective
+        assignment projector element (with poll, so called poll slide) is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='assignments/assignment',
+            id=self.assignment.pk,
+            poll=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     def get_assignment(self):
         return self.assignment
 
@@ -432,9 +446,6 @@ class AssignmentPoll(RESTModelMixin, CollectDefaultVotesMixin,
     def get_percent_base_choice(self):
         return config['assignments_poll_100_percent_base']
 
-    def get_slide_context(self, **context):
-        return super().get_slide_context(poll=self)
-
     def get_root_rest_element(self):
         """
         Returns the assignment to this instance which is the root REST element.

openslides/core/models.py

@@ -192,6 +192,36 @@ class Projector(RESTModelMixin, models.Model):
 
         return output
 
+    @classmethod
+    def remove_any(cls, skip_autoupdate=False, **kwargs):
+        """
+        Removes all projector elements from all projectors with matching kwargs.
+        Additional properties of active projector elements are ignored:
+
+        Example: Sending {'name': 'assignments/assignment', 'id': 1} will remove
+        also projector elements with {'name': 'assignments/assignment', 'id': 1, 'poll': 2}.
+        """
+        # Loop over all projectors.
+        for projector in cls.objects.all():
+            change_projector_config = False
+            projector_config = {}
+            # Loop over all projector elements of this projector.
+            for key, value in projector.config.items():
+                # Check if the kwargs match this element.
+                for kwarg_key, kwarg_value in kwargs.items():
+                    if not value.get(kwarg_key) == kwarg_value:
+                        # No match so the element should stay. Write it into
+                        # new config field and break the loop.
+                        projector_config[key] = value
+                        break
+                else:
+                    # All kwargs match this projector element. So mark this
+                    # projector to be changed. Do not write it into new config field.
+                    change_projector_config = True
+            if change_projector_config:
+                projector.config = projector_config
+                projector.save(skip_autoupdate=skip_autoupdate)
+
 
 class ProjectionDefault(RESTModelMixin, models.Model):
     """
@@ -308,6 +338,17 @@ class ProjectorMessage(RESTModelMixin, models.Model):
     class Meta:
         default_permissions = ()
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a projector message. Ensures that a respective
+        projector message projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='core/projector-message',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
 
 class Countdown(RESTModelMixin, models.Model):
     """
@@ -326,6 +367,17 @@ class Countdown(RESTModelMixin, models.Model):
     class Meta:
         default_permissions = ()
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a countdown. Ensures that a respective
+        countdown projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='core/countdown',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     def control(self, action):
         if action not in ('start', 'stop', 'reset'):
             raise ValueError("Action must be 'start', 'stop' or 'reset', not {}.".format(action))

openslides/core/static/js/core/site.js

@@ -1343,10 +1343,6 @@ angular.module('OpenSlidesApp.core.site', [
             Countdown.create(countdown);
         };
         $scope.removeCountdown = function (countdown) {
-            var isProjectedIds = countdown.isProjected();
-            _.forEach(isProjectedIds, function(id) {
-                countdown.project(id);
-            });
             Countdown.destroy(countdown.id);
         };
 
@@ -1359,10 +1355,6 @@ angular.module('OpenSlidesApp.core.site', [
             ProjectorMessage.create(message);
         };
         $scope.removeMessage = function (message) {
-            var isProjectedIds = message.isProjected();
-            _.forEach(isProjectedIds, function(id) {
-                message.project(id);
-            });
             ProjectorMessage.destroy(message.id);
         };
 

openslides/mediafiles/models.py

@@ -2,6 +2,7 @@ from django.conf import settings
 from django.db import models
 from django.utils.translation import ugettext as _
 
+from ..core.models import Projector
 from ..utils.autoupdate import inform_changed_data
 from ..utils.models import RESTModelMixin
 from .access_permissions import MediafileAccessPermissions
@@ -63,6 +64,17 @@ class Mediafile(RESTModelMixin, models.Model):
         inform_changed_data(self.uploader)
         return result
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a mediafile. Ensures that a respective
+        mediafile projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='mediafiles/mediafile',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     def get_filesize(self):
         """
         Transforms bytes to kilobytes or megabytes. Returns the size as string.

openslides/motions/models.py

@@ -10,7 +10,7 @@ from jsonfield import JSONField
 
 from openslides.agenda.models import Item
 from openslides.core.config import config
-from openslides.core.models import Tag
+from openslides.core.models import Projector, Tag
 from openslides.mediafiles.models import Mediafile
 from openslides.poll.models import (
     BaseOption,
@@ -300,6 +300,17 @@ class Motion(RESTModelMixin, models.Model):
         if not skip_autoupdate:
             inform_changed_data(self)
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a motion. Ensures that a respective
+        motion projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='motions/motion',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     def version_data_changed(self, version):
         """
         Compare the version with the last version of the motion.
@@ -859,6 +870,17 @@ class MotionBlock(RESTModelMixin, models.Model):
     def __str__(self):
         return self.title
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a motion block. Ensures that a respective
+        motion block projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='motions/motion-block',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     @property
     def agenda_item(self):
         """

openslides/topics/models.py

@@ -2,6 +2,7 @@ from django.contrib.contenttypes.fields import GenericRelation
 from django.db import models
 
 from ..agenda.models import Item
+from ..core.models import Projector
 from ..mediafiles.models import Mediafile
 from ..utils.models import RESTModelMixin
 from .access_permissions import TopicAccessPermissions
@@ -42,6 +43,17 @@ class Topic(RESTModelMixin, models.Model):
     def __str__(self):
         return self.title
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete a topic. Ensures that a respective
+        topic projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='topics/topic',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     @property
     def agenda_item(self):
         """

openslides/users/models.py

@@ -13,6 +13,7 @@ from django.db import models
 from django.db.models import Prefetch, Q
 from jsonfield import JSONField
 
+from ..core.models import Projector
 from ..utils.collection import CollectionElement
 from ..utils.models import RESTModelMixin
 from .access_permissions import (
@@ -210,6 +211,17 @@ class User(RESTModelMixin, PermissionsMixin, AbstractBaseUser):
             CollectionElement.from_instance(self)
         return super().save(*args, **kwargs)
 
+    def delete(self, skip_autoupdate=False, *args, **kwargs):
+        """
+        Customized method to delete an user. Ensures that a respective
+        user projector element is disabled.
+        """
+        Projector.remove_any(
+            skip_autoupdate=skip_autoupdate,
+            name='users/user',
+            id=self.pk)
+        return super().delete(skip_autoupdate=skip_autoupdate, *args, **kwargs)
+
     def has_perm(self, perm):
         """
         This method is closed. Do not use it but use openslides.utils.auth.has_perm.