查询在其中Symfony2的条款

Question

当我运行在where子句中，以下错误显示与日期查询dateformate ...

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

查询如下

$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

学说没有按给定没有DATE_FORMAT函数默认定义。有可能Register Custom DQL Function。

但是你可以很容易地比较不同的日期（假设a.paymentDate是date类型）：

$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(); 

编辑：我更喜欢使用querybuider编写DQL。它看起来像这样：

$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();