Implemented need_full_update check. Fixed #2396.

openslides/agenda/projector.py

@@ -59,3 +59,8 @@ class ListOfSpeakersSlide(ProjectorElement):
                 for speaker in query:
                     # Yield last speakers
                     yield speaker.user
+
+    def need_full_update_for_this(self, collection_element):
+        # Full update if item changes because then we may have new speakers
+        # and therefor need new users.
+        return collection_element.collection_string == Item.get_collection_string()

openslides/assignments/projector.py

@@ -23,7 +23,16 @@ class AssignmentSlide(ProjectorElement):
             yield assignment
             yield assignment.agenda_item
             for user in assignment.related_users.all():
+                # Yield user instances of current candidates (i. e. future
+                # poll participants) and elected persons (i. e. former poll
+                # participants).
                 yield user
             for poll in assignment.polls.all().prefetch_related('options'):
+                # Yield user instances of the participants of all polls.
                 for option in poll.options.all():
                     yield option.candidate
+
+    def need_full_update_for_this(self, collection_element):
+        # Full update if assignment changes because then we may have new
+        # candidates and therefor need new users.
+        return collection_element.collection_string == Assignment.get_collection_string()

openslides/core/models.py

@@ -128,8 +128,8 @@ class Projector(RESTModelMixin, models.Model):
         Returns True if this collection element is shown on this projector.
         """
         for requirement in self.get_all_requirements():
-            if (requirement.get_collection_string() == collection_element['collection_string'] and
-                    requirement.pk == collection_element['id']):
+            if (requirement.get_collection_string() == collection_element.collection_string and
+                    requirement.pk == collection_element.id):
                 result = True
                 break
         else:
@@ -147,9 +147,26 @@ class Projector(RESTModelMixin, models.Model):
                 result.append(projector)
         return result
 
-    def need_full_update_for(self, collection_element):
-        # TODO: Implement this for all ProjectorElements (also for config values!)
-        return True
+    def need_full_update_for_this(self, collection_element):
+        """
+        Returns True if this projector needs to be updated with all
+        instances as defined in get_all_requirements() because one active
+        projector element requires this.
+        """
+        # Get all elements from all apps.
+        elements = {}
+        for element in ProjectorElement.get_all():
+            elements[element.name] = element
+
+        for key, value in self.config.items():
+            element = elements.get(value['name'])
+            if element is not None and element.need_full_update_for_this(collection_element):
+                result = True
+                break
+        else:
+            result = False
+
+        return result
 
 
 class Tag(RESTModelMixin, models.Model):

openslides/motions/projector.py

@@ -25,3 +25,11 @@ class MotionSlide(ProjectorElement):
             yield motion.state.workflow
             yield from motion.submitters.all()
             yield from motion.supporters.all()
+
+    def need_full_update_for_this(self, collection_element):
+        # Full update if motion changes because then we may have new
+        # submitters or supporters and therefor need new users.
+        #
+        # Add some logic here if we support live changing of workflows later.
+        #
+        return collection_element.collection_string == Motion.get_collection_string()

openslides/utils/autoupdate.py

@@ -135,12 +135,12 @@ def send_data(message):
         send_all = False
     else:
         # Other elements are only send to the projector they are currently shown
-        projectors = Projector.get_projectors_that_show_this(message)
+        projectors = Projector.get_projectors_that_show_this(collection_element)
         send_all = None  # The decission is done later
 
     for projector in projectors:
         if send_all is None:
-            send_all = projector.need_full_update_for(message)
+            send_all = projector.need_full_update_for_this(collection_element)
         if send_all:
             output = get_projector_element_data(projector)
         else:

openslides/utils/projector.py

@@ -72,3 +72,12 @@ class ProjectorElement(object, metaclass=SignalConnectMetaClass):
         element. The config_entry has to be given.
         """
         return ()
+
+    def need_full_update_for_this(self, collection_element):
+        """
+        Returns True if this projector element needs to be updated with all
+        instances as defined in get_requirements(). The given
+        collection_element contains information about the changed instance.
+        Default is False.
+        """
+        return False