storage.py 文件源码

def _clear_cached_properties(self, setting, **kwargs):
        """Reset setting based property values."""
        if setting == 'MEDIA_ROOT':
            self.__dict__.pop('base_location', None)
            self.__dict__.pop('location', None)
        elif setting == 'MEDIA_URL':
            self.__dict__.pop('base_url', None)
        elif setting == 'FILE_UPLOAD_PERMISSIONS':
            self.__dict__.pop('file_permissions_mode', None)
        elif setting == 'FILE_UPLOAD_DIRECTORY_PERMISSIONS':
            self.__dict__.pop('directory_permissions_mode', None)