Symfony3 QueryBuilder使用Subquery进行更新

Question

我尝试过以下内容：

 $subQuery = $this->createQueryBuilder('teachingEvent')->select('teachingEvent.id')
        ->leftJoin('teachingEvent.timeTableEntry', 'timeTableEntry')
        ->leftJoin('timeTableEntry.course', 'course')
        ->where('course.school = :school' )
        ->andWhere('teachingEvent.date >= :fromDate')
        ->andWhere('teachingEvent.date <= :toDate')
        ->setParameters(array(':fromDate' => $from, ':toDate' => $to, ':school' => $school))
        ->getDQL();


    $query = $this->createQueryBuilder('teachingEvent')
        ->update()
        ->set('teachingEvent.schoolFreeDate', ':schoolFreeDate')
        ->where('teachingEvent.id IN ' . $subQuery)
        ->getQuery();

    return $query->getResult();

当我转出子查询时，我得到了这个：

“SELECT teachingEvent.id FROM AppBundle \ Entity \ TeachingEvent teachingEvent LEFT JOIN teachingEvent.timeTableEntry timeTableEntry LEFT JOIN timeTableEntry.course course WHERE course.school =：school AND teachingEvent.date> =：fromDate AND teachingEvent.date <=：toDate

对我来说，似乎现在应该工作 - 但我收到以下错误消息

[语法错误]第0行，第136栏：错误：预期的文字，得到'teachingEvent'

如果有人能找到错误会很好。

感谢你！

新年快乐 ;）！

Answer 1

您也可以通过首先从第一个查询构建器获取对象然后执行所需的更新来执行相同的操作

$teachingEvents =  $this->createQueryBuilder('teachingEvent')
                        ->select('teachingEvent')
                        ->leftJoin('teachingEvent.timeTableEntry', 'timeTableEntry')
                        ->leftJoin('timeTableEntry.course', 'course')
                        ->where('course.school = :school' )
                        ->andWhere('teachingEvent.date >= :fromDate')
                        ->andWhere('teachingEvent.date <= :toDate')
                        ->setParameters(array(':fromDate' => $from, ':toDate' => $to, ':school' => $school))
                        ->getQuery()
                        ->getResult();

foreach($teachingEvents as $teachingEvent){
    $teachingEvents->setSchoolFreeDate($someDate);
    $em->persist($teachingEvents);
    /* $em->flush(); flush here or after loop */
}

$em->flush();