django中models联合唯一unique_together

例：

文章点赞

class ArticleUpDown(models.Model):    """    点赞表    """    nid = models.AutoField(primary_key=True)    user = models.ForeignKey(to="UserInfo", null=True, on_delete=models.CASCADE)    article = models.ForeignKey(to="Article", null=True, on_delete=models.CASCADE)    is_up = models.BooleanField(default=True)

    class Meta:        unique_together = (("article", "user"),)        verbose_name="点赞"        verbose_name_plural=verbose_name

意思为在这个表中，每一行的user、artical字段必须唯一，否则报错。

原文地址：https://www.cnblogs.com/ttyypjt/p/10672343.html