Newscoop\Services\IssueService::getLatestPublishedIssue PHP Метод

    public function getLatestPublishedIssue()
    {
        $publication = $this->publicationService->getPublication();
        if (!$publication) {
            return;
        }
        $publicationId = $publication->getId();
        $cacheKey = $this->cacheService->getCacheKey(array('latest_published', $publicationId), 'issue');
        if ($this->cacheService->contains($cacheKey)) {
            $issue = $this->cacheService->fetch($cacheKey);
        } else {
            $issue = $this->em->getRepository('Newscoop\\Entity\\Issue')->getLastPublishedByPublication($publicationId)->getArrayResult();
            $this->cacheService->save($cacheKey, $issue);
        }
        if (empty($issue)) {
            return;
        }
        $latestPublishedIssue = $this->em->getReference('Newscoop\\Entity\\Issue', $issue[0]['id']);
        $this->setIssue($latestPublishedIssue);
        return $latestPublishedIssue;
    }