class Foo(models.Model):
manager = SealableManager()
as_manager = SealableQuerySet.as_manager()
class NonSealableClimate(models.Model):
objects = SealableQuerySet.as_manager()
class Meta:
db_table = Climate._meta.db_table
def test_isinstance_manager(self):
"""Manager classes are subclasses of Manager as many third-party apps expect."""
self.assertIsInstance(SealableManager(), models.Manager)
self.assertIsInstance(SealableQuerySet.as_manager(), models.Manager)