public function executeCommenting(sfWebRequest $request)
 {
   $this->forward404Unless($request->isXmlHttpRequest());
   $commentableObject = PropelQuery::from($request->getParameter('commentable_model'))->findPk($request->getParameter('commentable_id'));
   $comments = sfNestedCommentTools::getComments($commentableObject, $request);
   return $this->renderPartial('sfNestedComment/comment_list', array('comments' => $comments));
 }
 public function executeShowComments(sfWebRequest $request)
 {
   $this->comments = sfNestedCommentTools::getComments($this->object, $request);
   $this->commentForm = sfNestedCommentTools::createCommentForm($this->object, $this->getUser());
 }