/** 
  * Override the edit method, since we are passed a trigger id, whereas we need to edit the
  * associated action id.  
  */
 public function edit($id)
 {
     $filter = array('param1' => "" . $_SESSION['auth_user']->id . "", 'trigger_id' => $id, 'deleted' => 'f');
     $ta = $this->db->select('id')->from('trigger_actions')->where($filter)->limit(1)->get()->result_array();
     parent::edit($ta[0]->id);
 }