migration_tool.py 文件源码

def new(message: str):
    """
    Creates a new migration file.
    """
    files = _get_files()
    # build the message filename
    next_num = len(files) + 1
    f_message = list(' '.join(message)[:32].lower().replace(" ", "_"))

    filename_message = ''.join(filter(lambda c: c in string.ascii_lowercase + "_", f_message))
    f_name = "{:03d}_{}.py".format(next_num, filename_message)

    # format the template
    formatted_file = migration_template.format(revision=next_num, message=' '.join(message))
    p = migrations_dir / "versions" / f_name
    p.write_text(formatted_file)
    click.secho("Created new migration file {}.".format(f_name))