如何在 Django 中拥有同一个模型的两个外键? [英] How can I have two foreign keys to the same model in Django?

问题描述

我想对同一个模型有两个外键:

I want to have two foreign keys to the same model:

class Test(models.model):
    example1 = models.ForeignKey(Example)
    example2 = models.ForeignKey(Example)

我收到如下错误:

字段example1"的访问器与相关的冲突字段'Example.test_set'.添加一个 related_name 参数'example1'的定义.

Accessor for field 'example1' clashes with related field 'Example.test_set'. Add a related_name argument to the definition for 'example1'.

推荐答案

Django 使用一些 python 魔法来定义模型之间的关系，其中一些涉及在关系中使用模型的名称(这就是 'test' in 'test__set' 来自.)我猜，发生的事情是它试图将test__set"两次放入示例模型中，一次是为您定义的每个外键.

Django uses some python magic to define relationships between models, some of which involves using the name of the models in the relationships (that's where the 'test' in 'test__set' is coming from.) What's happening, I would guess, is that it's trying to put "test__set" in the Example model twice, once for each foreign key you've got defined.

错误消息建议尝试:定义一个 related_name 参数(覆盖其中一个test_set")，它可以使用它而不是自动生成两个冲突的名称.

The error message suggests something to try: define a related_name argument (overriding one of those 'test_set's) that it can use instead of auto-generating two clashing names.

更多信息这里:页面已被删除

More info here: page has been removed

与模型关系相关的当前页面:https://docs.djangoproject.com/en/2.0/ref/models/fields/#module-django.db.models.fields.related

Current page relating to model relationships: https://docs.djangoproject.com/en/2.0/ref/models/fields/#module-django.db.models.fields.related

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