public function AddAnswerAction()
 {
     $request = Project::getRequest();
     $question_model = new QuestionModel();
     $question_model->load($request->element_id);
     $answer_model = new AnswerModel();
     if ($question_model->id > 0) {
         $answer_model->addComment(Project::getUser()->getDbUser()->id, 0, 0, $request->element_id, $request->comment, 0, 0);
         $question_model->a_count++;
         $question_model->save();
     }
     //TODO:...
     Project::getResponse()->redirect($request->createUrl('QuestionAnswer', 'ViewQuestion', array($question_model->id)));
 }