python - Adding View_Group Perm to groups table using Django Rest Framework and Guardian -

i writing application using django 1.9, guardian , django rest framework.

i trying add new perm (view_group) groups. new perm control groups logged-in user can see when calling backend. using djangoobjectpermissions.

apparently seems daunting add view_group permission django.contrib.auth.models.group class. wondering if has managed it. if please let me see solution.

this models

from django.contrib.auth.models import group realgroup django.db import models guardian import shortcuts users.models import user  if not hasattr(realgroup, 'parent'):   field = models.foreignkey(realgroup, blank=true, null=true, related_name='children')   field.contribute_to_class(realgroup, 'parent')   class group(realgroup):   """   custom group.   """    class meta:     proxy = true     permissions = (("view_group", "can view group"), ) 

i getting exception content type matching query not exist. although trying hack , add system.