diff options
Diffstat (limited to 'tests')
| -rw-r--r-- | tests/schema/tests.py | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/tests/schema/tests.py b/tests/schema/tests.py index 7dfad1b5d6..9e23c4608e 100644 --- a/tests/schema/tests.py +++ b/tests/schema/tests.py @@ -863,6 +863,27 @@ class SchemaTests(TransactionTestCase): with self.assertRaises(IntegrityError): Note.objects.create(info=None) + @skipUnlessDBFeature('interprets_empty_strings_as_nulls') + def test_alter_textual_field_not_null_to_null(self): + """ + Nullability for textual fields is preserved on databases that + interpret empty strings as NULLs. + """ + with connection.schema_editor() as editor: + editor.create_model(Author) + columns = self.column_classes(Author) + # Field is nullable. + self.assertTrue(columns['uuid'][1][6]) + # Change to NOT NULL. + old_field = Author._meta.get_field('uuid') + new_field = SlugField(null=False, blank=True) + new_field.set_attributes_from_name('uuid') + with connection.schema_editor() as editor: + editor.alter_field(Author, old_field, new_field, strict=True) + columns = self.column_classes(Author) + # Nullability is preserved. + self.assertTrue(columns['uuid'][1][6]) + def test_alter_numeric_field_keep_null_status(self): """ Changing a field type shouldn't affect the not null status. |