Ojs\JournalBundle\Filter\JournalFilter::addFilterConstraint PHP Метод

    public function addFilterConstraint(ClassMetadata $targetEntity, $targetTableAlias)
    {
        $mappings = $targetEntity->getAssociationMappings();
        if (!array_key_exists('journal', $mappings) || $mappings['journal']['targetEntity'] !== 'Ojs\\JournalBundle\\Entity\\Journal') {
            return '';
        }
        //return if journal filter disabled globally for current entity
        if (isset($GLOBALS[$targetEntity->getName() . '#journalFilter']) && $GLOBALS[$targetEntity->getName() . '#journalFilter'] == false) {
            return '';
        }
        try {
            $selectedJournal = $this->journalService->getSelectedJournal();
        } catch (\Exception $e) {
            return '';
        }
        if (!$selectedJournal) {
            return '';
        }
        $journalJoinColumn = $mappings['journal']['joinColumns'][0]['name'];
        $addCondSql = $targetTableAlias . '.' . $journalJoinColumn . ' = ' . $selectedJournal->getId();
        return $addCondSql;
    }