test_migrations.py 文件源码

def test_constraint_name_method(self):
        from ..models import AwareModel, NaiveModel, SelfReferentialModel

        with connection.schema_editor() as editor:
            self.assertEqual(3, len(editor._constraint_names(AwareModel, index=True)))
            six.assertCountEqual(
                self,
                ['tests_awaremodel_pkey'],
                editor._constraint_names(AwareModel, primary_key=True)
            )
            six.assertCountEqual(self, [
                'tests_awaremodel_pkey',
                'tests_awaremodel_name_key'
            ], editor._constraint_names(AwareModel, unique=True))
            six.assertCountEqual(self, [
                'tests_awaremodel_name_key'
            ], editor._constraint_names(AwareModel, unique=True, primary_key=False))
            six.assertCountEqual(self, ['tests_awaremodel_pkey'], editor._constraint_names(AwareModel, primary_key=True, unique=True))
            six.assertCountEqual(self, [], editor._constraint_names(AwareModel, foreign_key=True))
            six.assertCountEqual(self, [], editor._constraint_names(AwareModel, foreign_key=True, primary_key=True))
            six.assertCountEqual(self, ['tests_awaremodel_factor_check'], editor._constraint_names(AwareModel, check=True))

        with connection.schema_editor() as editor:
            six.assertCountEqual(self, ['tests_naivemodel_pkey'], editor._constraint_names(NaiveModel, primary_key=True))
            six.assertCountEqual(self, ['tests_naivemodel_name_key'], editor._constraint_names(NaiveModel, unique=True, primary_key=False))

        with connection.schema_editor() as editor:
            # These constraint names appear to change between different versions of django or python?
            self.assertEqual(1, len(editor._constraint_names(SelfReferentialModel, foreign_key=True)))