Django | sort one-to-many relationship on Master's admin page

I have two models:

Folder
  ...

Photo
  folder = models.ForeignKey(Folder)开发者_高级运维

I was wondering if I can add a field to Folder's Admin edit page so that I can order the list of photos that would relate to that folder.

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If you are using InlineModelAdmin and development version of django, you can set ordering option and have the photos ordered.

Check the docs: http://docs.djangoproject.com/en/dev/ref/contrib/admin/#inlinemodeladmin-options

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Yes, this is a common problem with a not so documented fix that I found while trying to solve the same problem.

Specify the FormSet used by the Inline and override get_queryset() in your formset definition.

from django.forms.models import BaseInlineFormSet

class OrderedFormSet(BaseInlineFormSet):
    def get_queryset(self):
        return super(OrderedFormset, self).get_queryset().order_by('-sortfield')

class MyInline(admin.TabularInline):
    model = Item
    formset = OrderedFormSet