clean_unused.py 文件源码

def clean_unused():
    """
    A function to clear unreferenced media files.
    """

    if not hasattr(cache, 'delete_pattern'):
        # Abort if cache backend is not redis
        warnings.warn(
            'Unused files clearing aborted due to bad cache backend settings.')
        return

    _resolve_referenced_files(_fields_to_search())

    with os.scandir(settings.MEDIA_ROOT) as iterator:

        for entry in iterator:

            name = entry.name

            if not entry.is_file() or\
                    cache.get(_make_key(name)) is not None:
                continue

            default_storage.delete(name)