new_contents: from django.db import models
  from django.core.urlresolvers import reverse
  
  # Add admin Url to every content object
  def get_admin_url(self):
      return reverse('admin:%s_%s_change' % (self._meta.app_label,  self._meta.module_name),  args=[self.pk])
  
  models.Model.get_admin_url = get_admin_url
  
subject: add admin link to every model