Fixture tearDown doesn't handle constraints well

[rrauenza]

I get constraint errors during fixture teardown. At the moment I'm injecting a db flush to get around it, which seems to work ok.

   @classmethod
    def _fixture_teardown(cls):
        fixtures = getattr(cls, 'fixtures', None)
        _fb_should_teardown_fixtures = getattr(cls, '_fb_should_teardown_fixtures', True)
         # _fixture_teardown needs help with constraints.
         if fixtures and _fb_should_teardown_fixtures:
             call_command('flush', interactive=False, verbosity=1)
         return super(MyFastFixtureTestCase, cls)._fixture_teardown()

[jwhitlock]

There are a number of bugs around fixtures. Can you provide a test case or a public project that reproduces the error?