Question

为什么我要来：

Error: One or more models did not validate:
test.test: "unique_together" refers to slug. This is not
in the same model as the unique_together statement.
test.test: "unique_together" refers to version. This is not
in the same model as the unique_together statement.

我有这样的模型定义：

class SlugVersion(models.Model):
    class Meta:
        abstract = True
        unique_together = (('slug', 'version'),)

    slug = models.CharField(db_index=True, max_length=10, editable=False)
    version = models.IntegerField(db_index=True, editable=False)

class Base(SlugVersion):
    name = models.CharField(max_length=10)

class Test(Base):
    test = models.IntegerField()

我有Django 1.3。

Answer 1

Django似乎是bug。

Answer 2

这是因为Test使用multi-table inheritance从Base继承，它为这两个模型创建了单独的表，并将它们与OneToOne关系链接起来。因此，slug和version字段仅存在于Base表中，而不存在于测试表中。

您是否需要Base非抽象？换句话说，您会创建任何实际的Base个对象吗？如果将其设置为抽象，则此错误消失。

如何使用unique_together获得抽象模型？

2 个答案: