__init__.py 文件源码

def show(directory=None, revision='head'):
    """Show the revision denoted by the given symbol."""
    if alembic_version >= (0, 7, 0):
        config = current_app.extensions['migrate'].migrate.get_config(
            directory)
        command.show(config, revision)
    else:
        raise RuntimeError('Alembic 0.7.0 or greater is required')