from django.db import models class TSgroup(models.Model): group_id = models.IntegerField(primary_key=True) name = models.CharField(max_length=30) class AuthTS(models.Model): ts_group_id = models.ForeignKey(TSgroup) auth_group_id = models.ForeignKey('auth.Group') class UserTSgroup(models.Model): user_id = models.ForeignKey('auth.User') group_id = models.ManyToManyField(TSgroup)