Python Django Rest Framework UnorderedObjectListWarning

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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: https://github.com/django/django/blob/master/django/core/paginator.py#L100

It seems to be related to my queryset code:

return get_user_model().objects.filter(id=self.request.user.id)

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).

Thanks!

Edit:

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?

https://github.com/encode/django-rest-framework/blob/master/rest_framework/pagination.py#L166

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.

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We hope this article has helped you to resolve the problem. Apart from Python Django Rest Framework UnorderedObjectListWarning, check other __del__-related topics.

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Boris Danburry

Massachussetts | 2023-03-24

__del__ is always a bit confusing 😭 Python Django Rest Framework UnorderedObjectListWarning is not the only problem I encountered. Will use it in my bachelor thesis

Ken Schteiner

London | 2023-03-24

StackOverflow is always a bit confusing 😭 Python Django Rest Framework UnorderedObjectListWarning is not the only problem I encountered. I am just not quite sure it is the best method

Manuel OConnell

Abu Dhabi | 2023-03-24

I was preparing for my coding interview, thanks for clarifying this - Python Django Rest Framework UnorderedObjectListWarning in Python is not the simplest one. Will use it in my bachelor thesis

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