public function getWokrorderByProject($projId)
 {
     try {
         if ($projId != null) {
             $workorder = Workorder::getWokrorderByProject($projId);
             // possible user loading method
             if ($workorder !== null) {
                 echo AppUtil::getReturnStatus("Successful", $workorder);
             } else {
                 echo AppUtil::getReturnStatus("Unsuccessful", "Database Error Occurred");
             }
         } else {
             echo AppUtil::getReturnStatus("Unsuccessful", "Project value is empty");
         }
     } catch (Exception $e) {
         echo AppUtil::getReturnStatus("Unsuccessful", $e->getMessage());
     }
 }