/**
* @param string $institution
*/
public function getByInstitutionAndSubject($institution, Subject $subject)
{
$qb = $this->createQueryBuilder('j');
$qb->join('j.institution', 'i', 'WITH', 'i.slug=:institution')->join('j.subjects', 's', 'WITH', 's.id=:subject')->setParameter('institution', $institution)->setParameter('subject', $subject->getId());
return $qb->getQuery()->getResult();
}