/**
  * 予約ID取得
  *
  * @access	public
  */
 function getReserveIdByFirstReserve($reserve_details_id)
 {
     $params = array("reserve_details_id" => $reserve_details_id);
     $reserve_id = $this->_db->minExecute("reservation_reserve", "reserve_id", $params);
     if ($reserve_id === false) {
         return false;
     }
     return $reserve_id;
 }