public function save(Comment $comment)
 {
     $commentData = array('tacos_id' => $comment->getTacos()->getId(), 'usr_id' => $comment->getAuthor()->getId(), 'com_content' => $comment->getContent());
     if ($comment->getId()) {
         $this->getDb()->update('t_comment', $commentData, array('com_id' => $comment->getId()));
     } else {
         $this->getDb()->insert('t_comment', $commentData);
         $id = $this->getDb()->lastInsertId();
         $comment->setId($id);
     }
 }