Refs -- Fixed schema's test_m2m_rename_field_in_target_model test failure on SQLite < 3.20.
Mixing local test models with non-local models resulted in a referential
integrity error during tear down since the models are removed in separate
schema editor instances which each check constraints.
Failure appeared after
@@ -1455,14 +1455,14 @@ class SchemaTests(TransactionTestCase):
@isolate_apps('schema')
def test_m2m_rename_field_in_target_model(self):
- class TagM2MTest(Model):
+ class LocalTagM2MTest(Model):
title = CharField(max_length=255)
class Meta:
app_label = 'schema'
class LocalM2M(Model):
- tags = ManyToManyField(TagM2MTest)
+ tags = ManyToManyField(LocalTagM2MTest)
class Meta:
app_label = 'schema'
@@ -1470,18 +1470,19 @@ class SchemaTests(TransactionTestCase):
# Create the tables.
with connection.schema_editor() as editor:
editor.create_model(LocalM2M)
- editor.create_model(TagM2MTest)
+ editor.create_model(LocalTagM2MTest)
+ self.isolated_local_models = [LocalM2M, LocalTagM2MTest]
# Ensure the m2m table is there.
self.assertEqual(len(self.column_classes(LocalM2M)), 1)
- # Alter a field in TagM2MTest.
- old_field = TagM2MTest._meta.get_field('title')
+ # Alter a field in LocalTagM2MTest.
+ old_field = LocalTagM2MTest._meta.get_field('title')
new_field = CharField(max_length=254)
- new_field.contribute_to_class(TagM2MTest, 'title1')
+ new_field.contribute_to_class(LocalTagM2MTest, 'title1')
# @isolate_apps() and inner models are needed to have the model
# relations populated, otherwise this doesn't act as a regression test.
self.assertEqual(len(new_field.model._meta.related_objects), 1)
with connection.schema_editor() as editor:
- editor.alter_field(TagM2MTest, old_field, new_field, strict=True)
+ editor.alter_field(LocalTagM2MTest, old_field, new_field, strict=True)
# Ensure the m2m table is still there.
self.assertEqual(len(self.column_classes(LocalM2M)), 1)
