本文介绍了如何在Django中为我的模型设置两个主键字段的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个这样的模型:
class Hop(models.Model):
migration = models.ForeignKey('Migration')
host = models.ForeignKey(User, related_name='host_set')
我要迁移并同时将它们托管在一起作为主键.
I want to migration and host both together be the primary key.
推荐答案
我会稍微不同地实现这一点.
I would implement this slightly differently.
我将使用默认的主键(自动字段),并使用元类属性unique_together
I would use a default primary key (auto field), and use the meta class property, unique_together
class Hop(models.Model):
migration = models.ForeignKey('Migration')
host = models.ForeignKey(User, related_name='host_set')
class Meta:
unique_together = (("migration", "host"),)
它将充当代理"主键列.
It would act as a "surrogate" primary key column.
如果您确实要创建多列主键,请查看此应用
If you really want to create a multi-column primary key, look into this app
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