Fix problem when deleting multiple topics from a forum in bulk. We getting a list of topics from the database, then deleting each topic. But after you delete a topic, the forum.last_post on the remaining non-deleted topics can be stale. This was causing a weird DoesNotExist. Now just get the topics one at a time from the database.

"""
This file contains the admin definitions for the donations application.
"""
from django.contrib import admin
from donations.models import Donation

class DonationAdmin(admin.ModelAdmin):
    raw_id_fields = ('user', )

admin.site.register(Donation, DonationAdmin)