php - Symfony2 无法启动 session : already started by PHP

Question

我遇到了一个非常奇怪的问题，看起来像这样:

[2014-11-06 11:21:13] request.INFO: Matched route "core_timetracking_new_user" (parameters: "_controller": "Bricks\Custom\CoreBundle\Controller\TimeTrackingController::newuserAction", "_route": "core_timetracking_new_user") [] []
[2014-11-06 11:21:13] request.CRITICAL: Uncaught PHP Exception RuntimeException: "Failed to start the session: already started by PHP." at /var/cache/app/prod/classes.php line 113 {"exception":"[object] (RuntimeException: Failed to start the session: already started by PHP. at /var/cache/app/prod/classes.php:113)"} []

奇怪的是我没有启动 session 或使用它，这是 Controller 代码:

/**
 * @View
 */
public function newuserAction()
{
    $trackingService=$this->get('core.timetracking_service');
    $user= new TimeTrackingUser();
    $request=$this->getRequest();

    $form = $this->createFormBuilder($user)
        ->add('name','text')
        ->add('email','text')
        ->add('pass','password')
        ->add('save', 'submit', array('label' => 'Erstellen'))
        ->getForm();

    $form->handleRequest($request);

    if ($form->isValid()) {
        $trackingService->persistUser($form->getData());
        return $this->redirect($this->generateUrl('core_timetracking_user_list'));
    }else {
        return array(
            'form' => $form->createView()
        );
    }
}

虽然这个 Action 效果很好

/**
 * @View
 */
public function listuserAction()
{

    $request=$this->getRequest();
    $trackingService=$this->get('core.timetracking_service');    
    $users=$trackingService->getAllUsers();

    return array(
        'users' => $users
    );
}

所以唯一的区别是我使用

$form->handleRequest($request); 

还检查了我的所有文件 AppKernel 等是否以

两个 Action (工作的和不工作的)都在同一个 Controller 中

Answer 1

一旦你渲染了一个表单，Symfony 就会自动启动一个 session 来存储用于 CSRF 保护的 token : http://symfony.com/doc/current/book/forms.html#csrf-protection

您可以禁用 CSRF 保护，但它默认处于启用状态。

@rakete:
我唯一的额外想法是改变 session 文件的存储方式(例如文件系统、数据库、内存等)。看这里:http://symfony.com/doc/current/components/http_foundation/session_configuration.html