评论与子评论

1.评论与子评论

在创建数据表时，评论与子评论可以进行自相关，这样方便增删改查

class Commit(models.Model):
    nid = models.AutoField(primary_key=True)
    user = models.ForeignKey(to='UserInfo', to_field='nid')
    article = models.ForeignKey(to='Article', to_field='nid')
    content = models.CharField(max_length=255)
    create_time = models.DateTimeField(auto_now_add=True)
    # 这样写是可以的
    # parent_id=models.IntegerField()
    # 自关联
    # parent_id=models.ForeignKey(to='Commit',to_field='nid')
    parent = models.ForeignKey(to='self', to_field='nid',null=True,blank=True)

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