本文介绍了如何在django中为我的模型设置两个字段的主键的处理方法,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')
解决方案
我会实现这一点。
>我将使用默认主键(自动字段),并使用元类属性 unique_together
class Hop(models.Model):
/ pre>
migration = models.ForeignKey('Migration')
host = models.ForeignKey (User,related_name ='host_set')
class Meta:
unique_together =((migration,host))
它将作为代理主键列。
如果您真的要创建多列主键,请查看
I have a model like this:
class Hop(models.Model): migration = models.ForeignKey('Migration') host = models.ForeignKey(User, related_name='host_set')
I want to migration and host both together be primary key.
解决方案I would implement this slightly differently.
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"),)
It would act as a "surrogate" primary key column.
If you really want to create a multi-column primary key, look into this app
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