managers.py 文件源码

def punch_ballot(self, content=None, user=None, vote=0):
        """
        Essentially `update_or_create` with ContentType lookup
        """
        if content is None or user is None:
            raise TypeError("content and user are required for punch ballot")

        kwargs = {
            'content_type': ContentType.objects.get_for_model(content),
            'object_id': content.id,
            'user': user,
            'defaults': {
                'vote': vote,
            }
        }

        return self.update_or_create(**kwargs)