public function addAction()
 {
     $giangvien = new Model_Giangvien();
     $listDegree = $giangvien->findDegree();
     $this->view->listDegree = $listDegree;
     $findLastestGiangVien = $giangvien->findLastestGiangVien();
     $str = explode('GV', $findLastestGiangVien->lecturer_id);
     if ($str[1] < 9) {
         $num = $str[1] + 1;
         $array = array('GV000', $num);
         $lec_id = implode($str[0], $array);
     } elseif ($str[1] >= 9 && $str[1] < 99) {
         $num = $str[1] + 1;
         $array = array('GV00', $num);
         $lec_id = implode($str[0], $array);
     } elseif ($str[1] >= 99 && $str[1] < 999) {
         $num = $str[1] + 1;
         $array = array('GV0', $num);
         $lec_id = implode($str[0], $array);
     } elseif ($str[1] >= 999) {
         $num = $str[1] + 1;
         $array = array('GV', $num);
         $lec_id = implode($str[0], $array);
     }
     $this->view->lecturer_id = $lec_id;
     if ($this->_request->isPost()) {
         $data = $this->_getParam('searchParam');
         $giangvien->addGiangvien($data);
         $this->redirect('giaovu/lecturer/list');
     }
 }