Eccube\Repository\CustomerFavoriteProductRepository::isFavorite PHP Method

    public function isFavorite(\Eccube\Entity\Customer $Customer, \Eccube\Entity\Product $Product)
    {
        $qb = $this->createQueryBuilder('cf')->select('COUNT(cf.Product)')->andWhere('cf.Customer = :Customer AND cf.Product = :Product')->setParameters(array('Customer' => $Customer, 'Product' => $Product));
        $count = $qb->getQuery()->getSingleScalarResult();
        return $count > 0;
    }