Symfony Twig Extension 破坏了其他服务 - 模板是否在安全之前完成?

Symfony Twig Extension breaks other service - Is templating done before security?

我正在开发 Symfony 2.7 WebApp。我创建的其中一个捆绑包包括一项提供一些与用户相关的东西的服务,例如userHasPurchases().

问题是,包含 Twig Extesion 会破坏另一项服务:

AppShopService

namespace AppShopBundle\Service;

use AppBundle\Entity\User;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
...

class AppShopService {
    protected $user;

    public function __construct(TokenStorageInterface $tokenStorage, ...) {
        $this->user = $tokenStorage->getToken() ? $tokenStorage->getToken()->getUser() : null;
        ...
    }

    public function userHasPurchases(User $user) {
        $user = $user ? $user : $this->user;
        $result = $user...
        return result;
    }
}

AppShopBundle\Resources\config\services.yml

services:
    app_shop.service:
        class: AppShopBundle\Service\AppShopService
        arguments: 
            - "@security.token_storage"
            - ...

到目前为止一切正常:AppShopServices 是用当前用户创建的,userHasPurchases() 按预期工作。

现在我添加了一个 Twig Extension 以便能够在我的模板中使用 userHasPurchases():

树枝扩展

namespace AppShopBundle\Twig;

use AppShopBundle\Service\AppShopService;

class AppShopExtension extends \Twig_Extension {
    private $shopService;

    public function __construct(AppShopService $shopService) {
        $this->shopService = $shopService;
    }

    public function getName() {
        return 'app_shop_bundle_extension';
    }

    public function getFunctions() {
        $functions = array();

        $functions[] = new \Twig_SimpleFunction('userHasPurchases', array(
                $this,
                'userHasPurchases'
            ));

        return $functions;
    }

    public function userHasPurchases($user) {
        return $this->shopService->userHasPurchases($user);
    }
}

在 AppShopBundle\Resources\config\services.yml

中包含扩展
services:
    app_shop.service:
        class: AppShopBundle\Service\AppShopService
        arguments: 
            - "@security.token_storage"
            - ...

    app_shop.twig_extension:
        class: AppShopBundle\Twig\AppShopExtension
        arguments: 
          - "@app_shop.service"
        tags:
          - { name: twig.extension }

包含 Twig Extension 后,AppShopService 及其方法 userHasPurchases 不再有效。问题是,AppShopService 的构造函数不再设置 user,因为 $tokenStorage->getToken() 现在 returns null

这怎么可能?除了 Twig Extension 之外,我没有做任何更改。一旦我从 services.yml 中删除 Twig Extension ,一切都会再次正常工作。

我唯一的猜测是,Twig Extension 的创建是在任何安全性之前完成的。但是为什么?

知道这里可能出了什么问题吗?

不要在构造函数中与 tokenStorage 交互,只能在 userHasPurchases 方法中交互。

namespace AppShopBundle\Service;

use AppBundle\Entity\User;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorageInterface;
...

class AppShopService {
    protected $tokenStorage;

    public function __construct(TokenStorageInterface $tokenStorage, ...) {
        $this->tokenStorage = $tokenStorage;
    }

    public function userHasPurchases(User $user) {
        $user = $this->tokenStorage->getToken() ? $this->tokenStorage->getToken()->getUser() : null;
        $result = $user...
        return result;
    }
}

希望对您有所帮助