查詢並返回不同的值和數量總和

Question

我在Symfony 2中查詢，我試圖從聯合表中返回唯一值以及這些唯一值的總和。

例如：

Inventory Table: 

id | product_id | qty | warehouse_id 
---------------------------------------- 
1 | 123  | 5 | 1 
2 | 123  | 5 | 1 
3 | 123  | 5 | 1 
4 | 234  | 5 | 1 
5 | 345  | 5 | 1 
6 | 345  | 5 | 1 
7 | 345  | 5 | 1 
8 | 345  | 5 | 1 
9 | 345  | 5 | 1 
10 | 345  | 5 | 1 

Product Table: 

id | name  | sku  | description | 
------------------------------------------------ 
123 | Test 123 | Test 123 | Test 123 
234 | Test 234 | Test 234 | Test 234 
345 | Test 345 | Test 345 | Test 345 

到底

那麼，我需要在一個陣列是相當多以下信息加什麼都被回來從加入：

product_id: 123 qty: 15 
product_id: 234 qty: 5 
product_id: 345 qty: 30 

這裏我的完整查詢......我不太清楚如何在Symfony 2中使用該原則來做到這一點。謝謝你的幫助！

$search_string = trim($search_string); 
$em = $this->getEntityManager(); 
$query = $em->createQuery(" 
    SELECT i, p, il, w 
    FROM  WIC\InventoryBundle\Entity\Inventory i 
    LEFT JOIN i.product p 
    LEFT JOIN i.inventoryLocation il 
    LEFT JOIN il.warehouse w 
    WHERE  (p.name LIKE :tag OR p.sku LIKE :tag OR p.description LIKE :tag) 
    AND  p.account = :account_id 
    AND  il.warehouse = :location_id"); 
$query->setParameters(array(
    'tag'   => "%$search_string%", 
    'account_id' => $account_id, 
    'location_id' => $location_id 
)); 
return $query->getArrayResult(); 

Answer 1

您可以嘗試

$search_string = trim($search_string); 
$q = $this->getEntityManager() 
      ->getRepository('YourBundle:Inventory') 
      ->createQueryBuilder('i'); 
$query = $q->select('SUM(DISTINCT(i.qty))') 
    ->leftJoin('i.product', 'p') 
    ->leftJoin('i.inventoryLocation', 'il') 
    ->where($q->exp()->like('p.name', ':tag') 
    ->orWhere($q->exp()->like('p.sku', ':tag') 
    ->orWhere($q->exp()->like('p.description', ':tag') 
    ->andWhere('p.account = :account_id') 
    ->andWhere('il.warehouse = :location_id') 
    ->setParameter('tag', $q->expr()->literal("%$search_string%")) 
    ->setParameter('account_id', $account_id) 
    ->setParameter('location_id', $location_id) 
    ->getQuery(); 

return $query->getResult(); 

我沒究竟你的實體字段名是如此改正的基礎上你真的在你的實體映射