如何使用学说处理混合结果

Question

我正在使用symfony2和Query构建器。由于我的查询，我得到了混合的结果。我知道这是由于在SELECT中使用聚合函数，但我找不到任何其他方法，这正是我需要的。任何方向将不胜感激：

public function Inventory() {
    $em = $this->getEntityManager();
    $qb = $em->createQueryBuilder();
    $qb
        ->add('select', 'i.id, i.name, SUM(pod.quantityorder) as quantityordered, SUM(it.quantity) as quantityreceived')
        ->add('from', 'AutokeenPurchasingBundle:Items i')
        ->leftJoin('i.purchase_order_details', 'pod')
        ->leftJoin('i.inventory_transactions', 'it', 'WITH', 'it.inventory_transaction_type = 1')
        ->add('groupBy', 'i.id')
        ->addGroupBy('it.item')
        ->addGroupBy('pod.item')
        ->add('orderBy', 'i.id');
    $query = $qb->getQuery();
    $query->useResultCache('my_cache_id');
    return $result = $query->getScalarResult();
}