new_contents: # Apparently South has some problems with upgrading permissions. The
  # following piece of code hooks into the migrations and recreates the
  # permissions. See also
  # http://stackoverflow.com/questions/1742021/adding-new-custom-permissions-in-django/11914435#11914435
  
  from south.signals import post_migrate
  
  def update_permissions_after_migration(app,**kwargs):
      """
      Update app permission just after every migration.
      This is based on app django_extensions update_permissions management command.
      """
      from django.conf import settings
      from django.db.models import get_app, get_models
      from django.contrib.auth.management import create_permissions
  
      create_permissions(get_app(app), get_models(), 2 if settings.DEBUG else 0)
  
  post_migrate.connect(update_permissions_after_migration)
  
  
subject: Add a hack to work around a problem with South and permissions