Fix message filter

courses/views.py

@@ -175,18 +175,13 @@ class ProfessorMessageViewSet(viewsets.ModelViewSet):
 
     def get_queryset(self):
         queryset = super().get_queryset()
-        # 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()
-        queryset = queryset.order_by('-id').distinct()
+
+        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: