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Code Issues 32 Releases Wiki Activity

Fixed #23091: CreateModel and AddField were clashing with deferred SQL

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Andrew Godwin
2014-08-04 11:58:44 +10:00
parent 1b00738f73
commit c06e124b5e
3 changed files with 72 additions and 1 deletions
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42
tests/schema/tests.py
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@@ -331,6 +331,48 @@ class SchemaTests(TransactionTestCase):
self.assertEqual(columns['name'][0], "TextField")
self.assertEqual(bool(columns['name'][1][6]), False)
@unittest.skipUnless(connection.features.supports_foreign_keys, "No FK support")
def test_alter_fk(self):
"""
Tests altering of FKs
"""
# Create the table
with connection.schema_editor() as editor:
editor.create_model(Author)
editor.create_model(Book)
# Ensure the field is right to begin with
columns = self.column_classes(Book)
self.assertEqual(columns['author_id'][0], "IntegerField")
# Make sure the FK constraint is present
constraints = self.get_constraints(Book._meta.db_table)
for name, details in constraints.items():
if details['columns'] == ["author_id"] and details['foreign_key']:
self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
break
else:
self.fail("No FK constraint for author_id found")
# Alter the FK
new_field = ForeignKey(Author, editable=False)
new_field.set_attributes_from_name("author")
with connection.schema_editor() as editor:
editor.alter_field(
Book,
Book._meta.get_field_by_name("author")[0],
new_field,
strict=True,
)
# Ensure the field is right afterwards
columns = self.column_classes(Book)
self.assertEqual(columns['author_id'][0], "IntegerField")
# Make sure the FK constraint is present
constraints = self.get_constraints(Book._meta.db_table)
for name, details in constraints.items():
if details['columns'] == ["author_id"] and details['foreign_key']:
self.assertEqual(details['foreign_key'], ('schema_author', 'id'))
break
else:
self.fail("No FK constraint for author_id found")
def test_rename(self):
"""
Tests simple altering of fields