Django Admin filter on Foreign Key property
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.nameclass Booking(models.Model): room = models.ForeignKey(Room) def __unicode__(self): return self.room.house.town.nameclass 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)
I have found and tested following solution:
http://www.djangosnippets.org/snippets/1911/
It works with ForeignKeys, but it doesn't work with ManyToMany relations.
I ran into the same problem and really needed a solution. I have a workaround that lets you create a filter on a FK related model property. You can even traverse more than one FK relationship. It creates a new FilterSpec subclass that subclasses the default RelatedFilterSpec used to give you a filter on a ForeignKey field.