来自抽象模型领域的Django unique_together

Question

Suppose I have an Abstract Model:

class SoftDelete(models.Model):
    _active = models.NullBooleanField(default=True)

class Meta:
    abstract = True

And a model that inerhits from this abstract model:

class SomeModel(AbstractModel):
    some_field = models.IntegerField()

class Meta:
    unique_together = ('_active', 'some_field')

Here I've constrained some_field with the _active field by using unique_together, which is used by a soft-delete feature I have.

That works and all but, every model I have an unique constraint now needs to apply _active into the uniqueness since when deleted it's not really deleted, only _active = None .

My question is , since all my models will inerhit from SoftDelete is there an efficient way of applying _active to all models that have in their Metas an unique_together constraint? Instead of manually adding it and maybe forget of it.

I was hoping to add something like bellow to abstract's Meta class:

For unique_together in child_unique_together:
    unique_together.append('_active')

Answer 1

回答我自己的问题：由于找不到更好的解决方案，因此我采用了艰苦的方法并逐个模型地实现了唯一的共同模型。