Python Django Rest Framework UnorderedObjectListWarning [英] Python Django Rest Framework UnorderedObjectListWarning
问题描述
我从Django 1.10.4升级到1.11.1，突然我在运行测试时收到大量这些消息：
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)
我已经追溯到Django分页模块：
https：// github.com/django/django/blob/master/django/core/paginator.py#L100
I've traced that back to the Django Pagination module: https://github.com/django/django/blob/master/django/core/paginator.py#L100
这似乎与我的查询集代码有关：
It seems to be related to my queryset code:
return get_user_model().objects.filter(id=self.request.user.id)
如何找到此警告的更多详细信息？似乎我需要在每个过滤器的末尾添加 order_by（id），但是我似乎找不到要添加order_by的代码（因为警告不会返回堆栈跟踪，因此它会在我的测试运行期间随机发生）。
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).
谢谢！
编辑：
所以通过使用@KlausD。详细信息提示，我查看了一个导致此错误的测试：
So by using @KlausD. verbosity tip, I looked at a test causing this error:
response = self.client.get（'/ api / orders /'）
这将转到 OrderViewSet ，但是get_queryset中的所有内容均不会导致它，并且序列化程序类导致它。我还有其他使用相同代码获取/ api / orders的测试，而这些测试不会导致它.... get_queryset之后DRF会做什么？
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?
如果我在分页中添加了追溯功能，那么我会得到很多与django rest框架，但没有任何指向我的查询触发顺序警告的内容。
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.
推荐答案
因此，为了解决此问题我必须找到所有全部，偏移量，过滤器和 limit 子句，并在其中添加 order_by 子句。我通过添加默认顺序来解决一些问题：
So in order to fix this I had to find all of the all, offset, filter, and limit clauses and add a order_by clause to them. Some I fixed by adding a default ordering:
class Meta:
ordering = ['-id']
在Django Rest Framework的ViewSets（app / apiviews.py）中，我必须更新所有 get_queryset 方法似乎无法正常工作。
In the ViewSets for Django Rest Framework (app/apiviews.py) I had to update all of the get_queryset methods as adding a default ordering didn't seem to work.
希望这对其他人有帮助。 ：）
Hope this helps someone else. :)
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