public function getQueryResults($limit = null)
    {
        if (isset($limit)) {
            $this->queryBuilder->setMaxResults($limit);
        }
        
        if (!$this->queryBuilder->getDQLPart('orderBy')) {
            $this->queryBuilder->orderBy('a.createdAt', 'ASC');
        }

        return $this->queryBuilder->getQuery()->getResult();
    }