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

时间:2016-04-21 12:05:43

标签: php symfony twig twig-extension

我正在研究Symfony 2.7 WebApp。我创建的其中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在内的其他服务会破坏:

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\配置\ services.yml

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

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

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

Twig Extension

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中包含扩展程序

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 }

在列入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()现在返回null

这怎么可能?除了Twig Extension之外,我什么都没改变。我从Twig Extension移除services.yml后,一切正常。

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

知道这里可能有什么问题吗?

1 个答案:

答案 0 :(得分:3)

不要在构造函数中与tokenStorage进行交互,而只能在userHasPurchases方法中进行交互。

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;
    }
}

希望这个帮助