Transactions和symfony2实体管理器

Question

有没有办法在实体管理器（doctrine）中手动指定symfony2中的事务，或者是在单个事务中完成我在下面做的两个事情的一种自然方式？

// creating screen object... 
//Creating user object... 

     //flush the screen into database in order to get the Id to relate the server (user) to 
     $em->persist($screen); 
     $em->flush(); 

     //Get id of just inserted screen and attach that to new server (user) 
     $tempRecordId = $screen->getId(); 
     $tempEntity = $em->getRepository('BizTVContainerManagementBundle:Container')->find($tempRecordId); 
     $entity->setScreen($tempEntity); 

     //Flush the user also into database 
     $em->persist($entity); 
     $em->flush(); 

见我必须刷新我的第一个实体，以获取它的ID了，所以我可以与我的第二个实体给我的第一...

Answer 1

为什么难道你不只是做：

// creating screen object... 
//Creating user object... 
    $entity->setScreen($screen); 
    $em->persist($screen); 
    $em->persist($entity); 
    $em->flush(); 

Answer 2

try { 
    $em->getConnection()->beginTransaction(); 

    // do your thing here 

    $em->getConnection()->commit(); 
} catch (\Exception $e) { 
    $em->getConnection()->rollback(); 
    throw $e; 
}