I am struggling to extend the django.contrib.sites.admin. I am having a difficult time finding how to add a field to the sites admin page due to the fact that django.contrib.sites knows nothing of my foreign model. Is there an easy way which I am overlooking which would allow me to add the field "derp" from the following example to the sites admin? Do I have to extend django.contrib.sites.models safe/etc functionality to accomplish this? Thanks much.
class Herp(models.Model):
site = models.ForeignKey(Site)
derp = models.CharField(blank=True, max_length=15)
Edit: I should mention that I have the admin.py file with a class extending SiteAdmin. I understand the admin.site.unregister and admin.site.register. I just do not know how to include a field with a foreign key relation back to django.contrib.sites.