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我有以下型号:ManyToManyField初始化在Django
class Comment(models.Model):
uuid = models.CharField(max_length=40, default='random')
news = models.ForeignKey('News')
user = models.OneToOneField(User, primary_key=True) # ForeignKey('User')
text = models.CharField(max_length=300, null=True)
upvotes = models.PositiveIntegerField(default=0)
downvotes = models.PositiveIntegerField(default=0)
votes = models.ManyToManyField(User, through='Vote', related_name='votes_table')
class Vote(models.Model):
cmt = models.ForeignKey(Comment)
user = models.ForeignKey(User)
vote_type = models.SmallIntegerField(default=0) # vote_type is +1 for upvote & -1 for downvote
当用户提交一个新的评论,我初始化一个新的,像这样的:c = Comment(uuid=uuid.uuid4(),news=n, user=request.user, text=comment_text)
。现在的问题是,当我打印c.votes.exists()
时,它是True
。这条评论如何在comments_votes
表中有条目?
您是否在保存新评论前检查票是否存在? 当django处于DEBUG模型中时,您可以使用django.db中的 导入连接 print connection.queries [-1],您可以在django shell中看到生成的用于exists() –