I upgraded from Django 1.10.4 to 1.11.1 and all of a sudden I’m getting a ton of these messages when I run my tests:
lib/python3.5/site-packages/rest_framework/pagination.py:208: UnorderedObjectListWarning: Pagination may yield inconsistent results with an unordered object_list: <QuerySet [<Group: Requester>]> paginator = self.django_paginator_class(queryset, page_size)
I’ve traced that back to the Django Pagination module:
It seems to be related to my queryset code:
How can I find more details on this warning? It seems to be that I need to add a
order_by(id) on the end of every filter, but I can’t seem to find which code needs the order_by added (because the warning doesn’t return a stack trace and so it happens randomly during my test run).
So by using @KlausD. verbosity tip, I looked at a test causing this error:
response = self.client.get('/api/orders/')
This goes to
OrderViewSet but none of the things in get_queryset cause it and nothing in serializer class causes it. I have other tests that use the same code to get /api/orders and those don’t cause it…. What does DRF do after get_queryset?
If I put a traceback into pagination then I get a whole bunch of stuff related to django rest framework but nothing that points back to which of my queries is triggering the order warning.