Hotfix: Remove deprecated quiz__isnull filters

Author: krishnans2006

tin/apps/courses/views.py

@@ -30,7 +30,7 @@ def index_view(request):
     if request.user.is_student:
         assignments = (
             Assignment.objects.filter_visible(request.user)
-            .filter(course__students=request.user, quiz__isnull=True)
+            .filter(course__students=request.user, is_quiz=False)
             .order_by("due")
         )
 

tin/apps/submissions/models.py

@@ -27,8 +27,7 @@ def filter_visible(self, user):
             return self.all()
         else:
             return self.filter(
-                Q(assignment__course__teacher=user)
-                | Q(student=user) & Q(assignment__quiz__isnull=True)
+                Q(assignment__course__teacher=user) | Q(student=user) & Q(assignment__is_quiz=False)
             ).distinct()
 
     def filter_editable(self, user):