always use get_model in migrations

core/tickets/api_v2.py

@@ -22,11 +22,6 @@ class IssueViewSet(viewsets.ModelViewSet):
     queryset = IssueThread.objects.all()
 
 
-class CommentViewSet(viewsets.ModelViewSet):
-    serializer_class = CommentSerializer
-    queryset = Comment.objects.all()
-
-
 @api_view(['POST'])
 @permission_classes([IsAuthenticated])
 @permission_required('tickets.add_issuethread', raise_exception=True)
@@ -118,7 +113,6 @@ def add_comment(request, pk):
 
 router = routers.SimpleRouter()
 router.register(r'tickets', IssueViewSet, basename='issues')
-router.register(r'comments', CommentViewSet, basename='comments')
 
 urlpatterns = ([
                    re_path(r'^tickets/(?P<pk>\d+)/reply/$', reply, name='reply'),