Django权限按模型分组

Question

我想像下面这样构造

modelName      View   Add   Change   Delete
Group           Y      Y      Y        Y
User            Y      Y      Y        Y

我使用来查找数据

user = User.objects.get(username='test')
perm = Permission.objects.filter(Q(group__user=user)|Q(user=user)).distinct()

现在返回

Model         Permission
log entry       view_logentry
Demo           change_demopurpose
group             add_group
group            change_group
group             delete_group

但需要分组