Merge branch 'develop' into 'master'

Develop

See merge request !47

courses/views.py

@@ -172,13 +172,17 @@ class ProfessorMessageViewSet(viewsets.ModelViewSet):
 
     def get_queryset(self):
         queryset = super().get_queryset()
-
-        query = Q(
-            Q(users=self.request.user)
-            | Q(groups__in=self.request.user.groups.all())
-            | Q(professor=self.request.user)
-        )
-        queryset = queryset.filter(query).order_by('-id').distinct()
+        all_messages = self.request.query_params.get('all_messages', None)
+        if all_messages:
+            queryset = queryset.order_by('-id').distinct()
+        
+        else:
+            query = Q(
+                Q(users=self.request.user)
+                | Q(groups__in=self.request.user.groups.all())
+                | Q(professor=self.request.user)
+            )
+            queryset = queryset.filter(query).order_by('-id').distinct()
 
         classroom = self.request.query_params.get('classroom', None)
         if classroom: