Inconsistent test results for same test run twice

[schrinaw@…]

Please see this for a minimal project replicating the issue: ​https://github.com/aschriner/django_bug_demo

Please see this for a description of the problem: ​http://stackoverflow.com/questions/21631596/

[Marc Tamlyn]

The documentation you need to read is the following: ​https://docs.djangoproject.com/en/dev/ref/contrib/contenttypes/#the-contenttypemanager

In short, ContentType.objects.get_for_model() caches itself - a use case with a OneToOneField to ContentType is relatively unusual, and I don't think we need to change anything. Your test case should be fixed by adding ContentType.objects.clear_cache() in a tearDown method. I don't think it would be wise for us to automatically call this on all test teardowns, because it probably saves a bunch of test run time in some circumstances.