managers.py 文件源码

def _get_field_name(self):
        """ Return self.__field_name or 'site' or 'sites'. """

        if not self.__field_name:
            try:
                self.model._meta.get_field('site')
            except FieldDoesNotExist:
                self.__field_name = 'sites'
            else:
                self.__field_name = 'site'
        return self.__field_name