如何將SQL查詢轉換爲Doctrine2？

Question

我想將其轉換爲Doctrine2。

類似這些問題：
Symfony2/Doctrine2 - How to convert this SQL request with QueryBuilder?
How to convert a complex MySQL Query to Doctrine2
Convert SQL to Doctrine 2 Query Builder or DQL by using NOT IN?

這可能嗎？

SELECT 
SUM(q.amount) 

FROM(
SELECT amount 
    FROM expense_report e0_ 
    WHERE 
     (e0_.is_account_transfer = 0) 
      AND (e0_.remove_date IS NULL) 
    LIMIT 0, 2) q 

感謝

Answer 1

你可以用這個定製庫方法存檔您的問題：

public function getAmount() 
{ 
    $qb = $this->createQueryBuilder("q"); 
    return 
     $qb 
      ->select("sum(q.amount)") 
      ->where($qb->expr()->isNull('q.remove_date')) 
      ->andWhere('q.is_account_transfer = 0') 
      ->setFirstResult(0) 
      ->setMaxResults(2) 
      ->getQuery() 
      ->getSingleScalarResult(); 
} 

，簡單地使用它，因爲例如，在控制器的方法：

public function testAction() 
{ 
    .... 
    $totalAmount = $this->getDoctrine() 
         ->getRepository("AcmeDemoBundle:ExpenseReport") 
         ->getAmount(); 
    ... 
} 

希望得到這個幫助