Merge pull request #2016 from normanjaeckel/GetContext

Rename and refactor some ProjectorElement methods. Fixed #1631.

openslides/agenda/projector.py

@@ -18,7 +18,7 @@ class ItemListSlide(ProjectorElement):
     """
     name = 'agenda/item-list'
 
-    def get_context(self):
+    def check_data(self):
         pk = self.config_entry.get('id')
         if pk is not None:
             # Children slide.
@@ -48,7 +48,7 @@ class ListOfSpeakersSlide(ProjectorElement):
     """
     name = 'agenda/list-of-speakers'
 
-    def get_context(self):
+    def check_data(self):
         pk = self.config_entry.get('id')
         if pk is None:
             raise ProjectorException('Id must not be None.')

openslides/assignments/projector.py

@@ -14,7 +14,7 @@ class AssignmentSlide(ProjectorElement):
     """
     name = 'assignments/assignment'
 
-    def get_context(self):
+    def check_data(self):
         pk = self.config_entry.get('id')
         if pk is not None:
             # Detail slide.

openslides/core/models.py

@@ -70,8 +70,8 @@ class Projector(RESTModelMixin, models.Model):
     @property
     def elements(self):
         """
-        Retrieve all projector elements given in the config
+        Retrieve all projector elements given in the config field. For
-        field. For every element the method get_data() is called and its
+        every element the method check_and_update_data() is called and its
         result is also used.
         """
         # Get all elements from all apps.
@@ -90,7 +90,7 @@ class Projector(RESTModelMixin, models.Model):
                 result[key]['error'] = 'Projector element does not exist.'
             else:
                 try:
-                    result[key].update(element.get_data(
+                    result[key].update(element.check_and_update_data(
                         projector_object=self,
                         config_entry=value))
                 except ProjectorException as e:

openslides/core/projector.py

@@ -14,7 +14,7 @@ class CustomSlideSlide(ProjectorElement):
     """
     name = 'core/customslide'
 
-    def get_context(self):
+    def check_data(self):
         if not CustomSlide.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('Custom slide does not exist.')
 
@@ -74,7 +74,7 @@ class Countdown(ProjectorElement):
     """
     name = 'core/countdown'
 
-    def get_context(self):
+    def check_data(self):
         self.validate_config(self.config_entry)
 
     @classmethod
@@ -136,6 +136,6 @@ class Message(ProjectorElement):
     """
     name = 'core/message'
 
-    def get_context(self):
+    def check_data(self):
         if self.config_entry.get('message') is None:
             raise ProjectorException('No message given.')

openslides/mediafiles/projector.py

@@ -11,7 +11,7 @@ class MediafileSlide(ProjectorElement):
     """
     name = 'mediafiles/mediafile'
 
-    def get_context(self):
+    def check_data(self):
         try:
             Mediafile.objects.get(pk=self.config_entry.get('id'))
         except Mediafile.DoesNotExist:

openslides/motions/projector.py

@@ -14,7 +14,7 @@ class MotionSlide(ProjectorElement):
     """
     name = 'motions/motion'
 
-    def get_context(self):
+    def check_data(self):
         pk = self.config_entry.get('id')
         if pk is not None:
             # Detail slide.

openslides/users/projector.py

@@ -10,7 +10,7 @@ class UserSlide(ProjectorElement):
     """
     name = 'users/user'
 
-    def get_context(self):
+    def check_data(self):
         if not User.objects.filter(pk=self.config_entry.get('id')).exists():
             raise ProjectorException('User does not exist.')
 

openslides/utils/projector.py

@@ -34,23 +34,37 @@ class ProjectorElement(object, metaclass=SignalConnectMetaClass):
         if not cls.__name__ == 'ProjectorElement':
             return cls.__name__
 
-    def get_data(self, projector_object, config_entry):
+    def check_and_update_data(self, projector_object, config_entry):
         """
-        Returns all data to be sent to the client. The projector object and
+        Checks projector element data via self.check_data() and updates
-        the config entry have to be given.
+        them via self.update_data(). The projector object and the config
+        entry have to be given.
         """
         self.projector_object = projector_object
         self.config_entry = config_entry
         assert self.config_entry.get('name') == self.name, (
             'To get data of a projector element, the correct config entry has to be given.')
-        return {
+        self.check_data()
-            'context': self.get_context()}
+        return self.update_data() or {}
 
-    def get_context(self):
+    def check_data(self):
         """
-        Returns the context of the projector element.
+        Method can be overridden to validate projector element data. This
+        may raise ProjectorException in case of an error.
+
+        Default: Does nothing.
         """
-        return None
+        pass
+
+    def update_data(self):
+        """
+        Method can be overridden to update the projector element data
+        output. This should return a dictonary. Use this for server
+        calculated data which have to be forwared to the client.
+
+        Default: Does nothing.
+        """
+        pass
 
     def get_requirements(self, config_entry):
         """

tests/integration/core/test_views.py

@@ -34,8 +34,7 @@ class ProjectorAPI(TestCase):
                 'aae4a07b26534cfb9af4232f361dce73':
                     {'id': customslide.id,
                      'uuid': 'aae4a07b26534cfb9af4232f361dce73',
-                     'name': 'core/customslide',
+                     'name': 'core/customslide'}},
-                     'context': None}},
             'scale': 0,
             'scroll': 0})