public function findAttributeValues($product)
    {
        // select
        $qb = $this->getQueryBuilder()
            ->select('a.name attributeName, av.name, i.path imagePath');

        // join
        $qb->join('p.attributeValues', 'av')
            ->join('av.attribute', 'a')
            ->leftJoin('av.image', 'i');

        // where
        $qb->andWhere('p = :product')
            ->setParameter('product', $product);

        // order by
        $qb->orderBy('a.order', 'asc');

        return $qb->getQuery()
            ->getResult();
    }