Stats/src/StatsBundle/Repository/OnuRepository.php

<?php

namespace StatsBundle\Repository;

class OnuRepository extends \Doctrine\ORM\EntityRepository
{

    /**
     * @param string $customId
     * 
     * @return Onu|null
     */
    public function findByCustomId($customId)
    {
        list($ponSerialNumber, $oltDeviceId, $deviceServerId) = explode('~', $customId);
        $qb = $this->createQueryBuilder('Onu')
            ->join('Onu.deviceServer', 'deviceServer')
            ->where('Onu.ponSerialNumber = :ponSerialNumber')->setParameter('ponSerialNumber', $ponSerialNumber)
            ->andWhere('Onu.oltDeviceId = :oltDeviceId')->setParameter('oltDeviceId', $oltDeviceId)
            ->andWhere('deviceServer.id = :deviceServerId')->setParameter('deviceServerId', $deviceServerId)
        ;

        return $qb->getQuery()->getOneOrNullResult();
    }

}