Can I make list_filter in django admin to only show referenced ForeignKeys?

Question

I have a django application which has two models like this:

class MyModel(models.Model):
    name = models.CharField()
    country = models.ForeignKey(\'Coun         


        

Answer 1

As of Django 1.8, there is a built in RelatedOnlyFieldListFilter, which you can use to show related countries.

class MyModelAdmin(admin.ModelAdmin):
    list_display = ('name', 'country',)
    list_filter = (
        ('country', admin.RelatedOnlyFieldListFilter),
    )

For Django 1.4-1.7, list_filter allows you to use a subclass of SimpleListFilter. It should be possible to create a simple list filter that lists the values you want.

If you can't upgrade from Django 1.3, you'd need to use the internal, and undocumented, FilterSpec api. The Stack Overflow question Custom Filter in Django Admin should point you in the right direction.