查詢在其中Symfony2的條款

Question

當我運行在where子句中，以下錯誤顯示與日期查詢dateformate ...

[Syntax Error] line 0, col 129: Error: Expected known function, got 'DATE_FORMAT' 

查詢如下

$query = $this->getEntityManager()->createQuery(
    "SELECT a.id, a.amont, a.paymentDescrip, a.paymentType, a.paymentDate 
    FROM RegalSmsBundle:DailyTransaction a 
    WHERE DATE_FORMAT(a.paymentDate,'%Y-%m-%d') = :paymentDate 
     and a.students = :studentId" 

    )->setParameter('studentId', $studentId) 
    ->setParameter('paymentDate','2013-03-11'); 


return $query->getResult(); 

Answer 1

學說沒有按給定沒有DATE_FORMAT函數默認定義。有可能Register Custom DQL Function。

但是你可以很容易地比較不同的日期（假設a.paymentDate是date類型）：

$query = $this->getEntityManager()->createQuery(" 
     SELECT a.id, a.amont, a.paymentDescrip, a.paymentType, a.paymentDate 
     FROM RegalSmsBundle:DailyTransaction a 
     WHERE a.paymentDate = :paymentDate AND a.students = :studentId 
    ") 
    ->setParameter('studentId', $studentId) 
    ->setParameter('paymentDate', new \DateTime('2013-03-11')) 
; 

return $query->getResult(); 

編輯：我更喜歡使用querybuider編寫DQL。它看起來像這樣：

$qb = $this->getEntityManager()->getRepository('RegalSmsBundle:DailyTransaction')->createQueryBuilder('a'); 
$qb 
    ->select('a') // select whole entity 
    ->where($qb->expr()->andX(
     $qb->expr()->eq('a.paymentDate', ':paymentDate') 
     $qb->expr()->eq('a.students', ':studentId') 
    )) 
    ->setParameter('studentId', $studentId) 
    ->setParameter('paymentDate', new \DateTime('2013-03-11')) 
; 

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