Django Admin filter on Foreign Key property
I want to add a filter in an admin changelist by a property of a f开发者_Go百科oreign 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?
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)
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.
See http://djangosnippets.org/snippets/2260/
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