Django 联合唯一UniqueConstraint

from django.db import models


class UserAttention(models.Model):
    watcher = models.ForeignKey(\'user.User\', on_delete=models.CASCADE, related_name="attention")
    goal = models.ForeignKey(\'goal.Goal\', on_delete=models.CASCADE, related_name="watcher")
    level = models.IntegerField(verbose_name="亲密度", default=0)

    class Meta:
        constraints = [models.UniqueConstraint(fields=[\'watcher\', \'goal\'], name=\'unique_attention\')]

　　

用来限制watcher和goal联合唯一索引