public function getArticlesForSection($publication, $sectionNumber, $sectionLanguage = null)
{
$em = $this->getEntityManager();
$queryBuilder = $em->getRepository('Newscoop\\Entity\\Article')->createQueryBuilder('a')->where('a.sectionId = :sectionNumber')->andWhere('a.language = :sectionLanguage')->andWhere('a.publication = :publicationId')->setParameters(array('sectionNumber' => $sectionNumber, 'sectionLanguage' => $sectionLanguage, 'publicationId' => $publication));
$qbCount = clone $queryBuilder;
$qbCount->select('count(a)');
$articlesCount = $qbCount->getQuery()->getSingleScalarResult();
$query = $queryBuilder->getQuery();
$query->setHint('knp_paginator.count', $articlesCount);
return $query;
}