会话中的持久和齐平对象

Question

我有两个控制器，一个记录修改后的实体并将其放入会话中：

public function update_accountAction(Request $request)
{   
    Try
    {
        $code = $request->request->get('code'); 
        $name = $request->request->get('name'); 
        $em = $this->getDoctrine()->getManager();
        $repo = $em->getRepository('NRtworksChartOfAccountsBundle:Accounttree');
        $to_change = new Accounttree();
        $to_change = $repo->findOneByCode($code);
        $to_change->setName($name);
        $to_change->setCode($code);
        $session = $this->getRequest()->getSession();
        $entity_to_update = $session->get('entity_to_update');
        $counter = $session->get('number_of_changes');
        $entity_to_update[] = $to_change;  
        $counter = $counter +1;
        $session->set('number_of_changes',$counter);
        $session->set('entity_to_update',serialize($entity_to_update));

        $response = array("code" => 100, "success" => true, "modified" => $entity_to_update);
        return new Response(json_encode($response));
    }
    Catch(Exception $e)
    {
        $response = array("code" => 100, "success" => false, "error" => $e);
        return new Response($response);
    }
}

和另一个循环结果，如果它实际上是所需的对象之一。终于我冲洗了。

public function save_changesAction()
 {
     Try
     {
         $em = $this->getDoctrine()->getManager();
         $session = $this->getRequest()->getSession();
         $entity_to_update = unserialize($session->get('entity_to_update'));

         foreach($entity_to_update as $account)
         {
             if($account->getId())
             {                     
                $em->persist($account); 
                echo $account->getId();
             }
             else
             {
                   echo "error";
             }
         }
         $em->flush();
         $response = array("code" => 100, "success" => true, "modified" => $account->getId());
         return new Response(json_encode($response));
     }
     Catch(Exception $e)
     {
        $response = array("code" => 100, "success" => false, "error" => $e);
        return new Response($response);
     }
}

因此，结果是：contexterRorexception：注意：未定义的索引：0000007A60B04100000000000077AE6AFD8 IN/home/eagle1/www/symfony24/www/symfony24/vendor/doctrine/doctrine/doctrine/doctrine/lib/lib/doctrine/doctrine/doctrine/orm/orm/orm/unitofwork.php line 2852

不明白为什么，因为看来我恢复了一个功能齐全的对象（我可以执行其功能，访问其属性，并且似乎持续存在正常工作...

有人知道答案吗？

Answer 1

从会话中拉出对象时，它不会由学说管理。您必须将其合并回通知实体经理。

if($account->getId())
{                     
    $account = $em->merge($account);
    $em->persist($account); 
    echo $account->getId();
 }

学说有会话中实体的手册部分