Tests were failing because of:
* Models weren't being imported from their new location.
* PolymorphicManager doesn't work with non-polymorphic models, but
migrations run models' manager, so having MROBase3 with
PolymorphicManager failed.
* Some tests failed due to have assertions were being done (since they
hardcoded expected instance ids). Update tests to use comparisons
similar to #312
Tests were failing on postgres due to foreign keys pointing to missing
tables.
In order for these tables to be present, we need migrations which
declare depending on `content_type`.
Several tests were failing with django master. This is because,
apparently, IDs don't match those expected in tests, and other
test-related details.
Replace all test comparisons with assertQuerysetEqual, which is safer
and cleaner for the sort of comparison we're doing.
When using .defer on a PolymorphicQuerySet with multiple childs that
subclass from the same polymorphic parent model yield an error like:
>>> Base.objects.defer('ModelY___field_y')
Traceback (most recent call last):
...
FieldDoesNotExist: ModelX has no field named 'field_y'
This avoids the following error in django 1.11 tests:
polymorphic.MRODerived: (models.E005) The field 'id' from parent model 'polymorphic.mrobase3' clashes with the field 'id' from parent model 'polymorphic.mrobase1'.
Related to https://code.djangoproject.com/ticket/22442
Krzysztof Gromadzki
Diederik van der Boor
Hugo Osvaldo Barrera
trbs
Jerome Leclanche
Tadas Dailyda
Charlie Denton