migrations.py 文件源码

def create_drop_model(field, filters: List[str]):
    """Creates and drops a model with the specified field.

    Arguments:
        field:
            The field to include on the
            model to create and drop.

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

    model = define_fake_model({'title': field})

    with filtered_schema_editor(*filters) as (schema_editor, calls):
        execute_migration(schema_editor, [
            migrations.CreateModel(
                model.__name__,
                fields=[
                    ('title', field.clone())
                ]
            ),
            migrations.DeleteModel(
                model.__name__,
            )
        ])

    yield calls