code: def success(self, objects, message=None):
          
          if self.is_context_only(objects):
              return self.redirect(message=_("Changes saved."))
  
          ids = map(api.get_id, objects)
          if not message:
              message = _("Saved items: {}").format(", ".join(ids))
          return self.redirect(message=message)
docs: Redirects the user to success page with informative message