diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/schema/tests.py | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/tests/schema/tests.py b/tests/schema/tests.py index fee5ca9d2b..9b2b512c1b 100644 --- a/tests/schema/tests.py +++ b/tests/schema/tests.py @@ -4951,6 +4951,38 @@ class SchemaTests(TransactionTestCase): self.assertIsNone(self.get_column_collation(Author._meta.db_table, "name")) @skipUnlessDBFeature("supports_collation_on_charfield") + def test_alter_field_type_preserve_db_collation(self): + collation = connection.features.test_collations.get("non_default") + if not collation: + self.skipTest("Language collations are not supported.") + + with connection.schema_editor() as editor: + editor.create_model(Author) + + old_field = Author._meta.get_field("name") + new_field = CharField(max_length=255, db_collation=collation) + new_field.set_attributes_from_name("name") + new_field.model = Author + with connection.schema_editor() as editor: + editor.alter_field(Author, old_field, new_field, strict=True) + self.assertEqual( + self.get_column_collation(Author._meta.db_table, "name"), + collation, + ) + # Changing a field type should preserve the collation. + old_field = new_field + new_field = CharField(max_length=511, db_collation=collation) + new_field.set_attributes_from_name("name") + new_field.model = Author + with connection.schema_editor() as editor: + editor.alter_field(Author, new_field, old_field, strict=True) + # Collation is preserved. + self.assertEqual( + self.get_column_collation(Author._meta.db_table, "name"), + collation, + ) + + @skipUnlessDBFeature("supports_collation_on_charfield") def test_alter_primary_key_db_collation(self): collation = connection.features.test_collations.get("non_default") if not collation: |