Symfony Twig Extension打破其他服务 - 在安全之前进行模板化吗？

Question

我正在研究Symfony 2.7 WebApp.我创建的一个包包括一个提供一些用户相关内容的服务,例如userHasPurchases().

问题是,包括Twig Extesion打破另一项服务:

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 \资源\设置\ services.yml

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

到目前为止一切正常:AppShopServices使用当前用户创建userHasPurchases()并按预期工作.

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

树枝延伸

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 }

在结束之后Twig Extension,AppShopService它的方法userHasPurchases不再起作用了.问题是,自从现在返回后,构造函数AppShopService不再设置.user$tokenStorage->getToken()null

这怎么可能？我没有改变,除了包括Twig Extension.当我删除Twig Extension从services.yml一切又正常工作.

我唯一的猜测是,Twig Extension在任何安全性之前完成创建.但为什么？

知道这里可能有什么问题吗？

Answer 1

不要在构造函数中与 tokenStorage 交互，而只在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;
    }
}

希望这有帮助