django permission สำหรับ User

from django.db import models
from django.contrib.auth.models import User
from django.db.models.signals import post_save

class UserProfile(models.Model):  
    user = models.OneToOneField(User)  
    name = models.CharField(null=True, blank=True, max_length=255)

    class Meta:
        permissions = (
            ('permission_code', 'Friendly permission description'),
        )

    def __str__(self):  
          return "%s's profile" % self.user  

from django.contrib.auth.models import Permission, User
from django.shortcuts import get_object_or_404

def user_gains_perms(request, user_id):
    user = get_object_or_404(User, pk=user_id)
    # any permission check will cache the current set of permissions
    user.has_perm('myapp.change_bar')

    permission = Permission.objects.get(codename='change_bar')
    user.user_permissions.add(permission)

    # Checking the cached permission set
    user.has_perm('myapp.change_bar')  # False

    # Request new instance of User
    # Be aware that user.refresh_from_db() won't clear the cache.
    user = get_object_or_404(User, pk=user_id)

    # Permission cache is repopulated from the database
    user.has_perm('myapp.change_bar')  # True

@permission_required('control.permission_code')
def new(request):
 somecode...