Question

我有两个模型：

class Foo(models.Model):
    from = models.ForeignKey(Place)
    to = models.ForeignKey(Place)

class Bar(models.Model):
    foo = models.ForeignKey(Foo)
    place = models.ForeignKey(Place)

我需要验证Bar的位置字段可以来自或到达。例如，如果我从-伦敦到-纽约，我只能在这两个地方之间选择子模型的地方。如何在序列化器中执行？谢谢！

Answer 1

要对多个“模型”字段进行自定义验证，应使用Model.clean（）

https://docs.djangoproject.com/en/dev/ref/models/instances/#django.db.models.Model.clean

class Bar(models.Model):
    foo = models.ForeignKey(Foo)
    place = models.ForeignKey(Place)

    def clean(self):
        # Your check here
        if self.place: #between self.foo.from and self.foo.to
            #Your code here
            pass
        else:
            raise ValidationError("Place isn't between frow and to")

通过父模型场验证

1 个答案: