Django Admin filter on Foreign Key property

Question

I want to add a filter in an admin changelist by a property of a foreign key, e.g.

class Address(model.Models):     street = models.CharField(max_length=25)             city = models.CharField(max_length=25)     country = models.CharField(max_length=25)          class Customer(models.Model):     name = models.CharField(max_length=25)     address = models.ForeignKey(Address) 

Let's say in the Customer admin changelist I want to show a filter by city and country (so show me all customers in a particular country or city).

But the standard list_filter() functionality seems to only allow filtering by fields directly on the model and not on any of its foreign key. I've tried:

list_filter = ("address__country",) 

or

list_filter = ("address.country",) 

but I always get the same type of error:

 'address__country' is not a callable or an attribute  

Any suggestions would be welcome. Is there some special naming convention/syntax to allow filtering on FK properties?

Answer 1

See https://code.djangoproject.com/ticket/3400 . It works ok in django 1.3 :)

class Room(models.Model):     house = models.ForeignKey(House)      def __unicode__(self):         return self.house.town.name  class Booking(models.Model):     room = models.ForeignKey(Room)      def __unicode__(self):         return self.room.house.town.name  class BookingOpts(admin.ModelAdmin):     list_filter = ('room__house__town',)     raw_id_admin = ('room', )  admin.site.register(Town) admin.site.register(House) admin.site.register(Room) admin.site.register(Booking, BookingOpts)