MyBundle\Repository\RecentSearchRepository.php

<?php

namespace MyBundle\Repository;

use MyBundle\Entity\Customer;
use Doctrine\ORM\EntityRepository;

class RecentSearchRepository extends EntityRepository
{
    public function findRecentByUser(Customer $user)
    {
        $query = $this->getEntityManager()
            ->createQueryBuilder()
            ->select('s')
            ->from('MyBundle:RecentSearch','s')
            ->where('s.customer = :user')
            ->setParameter(':user', $user);
    }
}