Python django.db.migrations 模块，AlterModelTable() 实例源码

def test_alter_model_table(self):
        project_state = self.set_up_test_model()
        operation = migrations.AlterModelTable('Pony', 'tests_pony_2')
        new_state = project_state.clone()
        operation.state_forwards('tests', new_state)
        self.assertTableExists('tests_pony')
        self.assertTableNotExists('tests_pony_2')
        with connection.schema_editor() as editor:
            operation.database_forwards('tests', editor, project_state, new_state)
        self.assertTableExists('tests_pony_2')
        self.assertTableNotExists('tests_pony')
        with connection.schema_editor() as editor:
            operation.database_backwards('tests', editor, new_state, project_state)
        self.assertTableExists('tests_pony')
        self.assertTableNotExists('tests_pony_2')

def alter_db_table(field, filters: List[str]):
    """Creates a model with the specified field
    and then renames the database table.

    Arguments:
        field:
            The field to include into the
            model.

        filters:
            List of strings to filter
            SQL statements on.
    """

    model = define_fake_model()
    project = migrations.state.ProjectState.from_apps(apps)

    with connection.schema_editor() as schema_editor:
        execute_migration(schema_editor, [
            migrations.CreateModel(
                model.__name__,
                fields=[
                    ('title', field.clone())
                ]
            )
        ], project)

    with filtered_schema_editor(*filters) as (schema_editor, calls):
        execute_migration(schema_editor, [
            migrations.AlterModelTable(
                model.__name__,
                'NewTableName'
            )
        ], project)

    yield calls