Django admin - Create a complex filter on User model

Question

I have a field Foo with a ForeignKey that points to User . I need to create filter in the admin that only displays User that have at least one Foo . This would be easy with the development version of Django, but I am stuck with the 1.3.

I have seen here how to add a custom filter using the undocumented FilterSpec class. My problem is that it requires to modify the User model. I could inherit from User , but I already ave a setup where additional data is put into a Profile model wiith a one-to.one link to User .

Is there a less intrusive way to add a custom filter to the User model?

Answer 1

实际上，您可以在ORM查询中向后使用外键关系。

User.objects.filter(foo__isnull=False)