Php 如何在细枝扩展服务中获取当前用户[symfony2.8]

我正在尝试在我的

NotificationExtension.php

中获取当前

用户。但是页面加载速度变得非常慢，我也会遇到以下错误：

错误：在null上调用成员函数getUser（）

错误说明无法获取当前用户，但我正在登录

这是我的服务：

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager', '@service_container', '@security.context']
  tags:
        - { name: twig.extension }

<?php

namespace Application\Sonata\UserBundle\Twig;

use Doctrine\ORM\EntityManager;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
use Twig_Extension;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Security\Core\SecurityContext;
use Symfony\Component\Security\Core\Security;

class NotificationExtension extends \Twig_Extension
{
    protected $container;
    protected $em;

    public function __construct(EntityManager $em,ContainerInterface $container, SecurityContext $context)
    {
        $this->container = $container;
        $this->em = $em;
        $this->doctrine = $container->get('doctrine');
        $this->context = $context;
    }

    public function getGlobals()
    {
        $user = $this->container->get('security.context')->getToken()->getUser();

        return(array(

            'unreadMessagesCount' => $this->em->getRepository('ApplicationSonataUserBundle:Notif')->findBy(
                    array(
                        'user' => $user,
                        'seen' => true
                    ),
                    array('date' => 'DESC')
                )));
    }

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

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager','@security.token_storage']
  tags:
        - { name: twig.extension }

public function getUser()
{
    return $this->tokenStorage->getToken()->getUser();
}

通知扩展名：

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager', '@service_container', '@security.context']
  tags:
        - { name: twig.extension }

<?php

namespace Application\Sonata\UserBundle\Twig;

use Doctrine\ORM\EntityManager;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
use Twig_Extension;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Security\Core\SecurityContext;
use Symfony\Component\Security\Core\Security;

class NotificationExtension extends \Twig_Extension
{
    protected $container;
    protected $em;

    public function __construct(EntityManager $em,ContainerInterface $container, SecurityContext $context)
    {
        $this->container = $container;
        $this->em = $em;
        $this->doctrine = $container->get('doctrine');
        $this->context = $context;
    }

    public function getGlobals()
    {
        $user = $this->container->get('security.context')->getToken()->getUser();

        return(array(

            'unreadMessagesCount' => $this->em->getRepository('ApplicationSonataUserBundle:Notif')->findBy(
                    array(
                        'user' => $user,
                        'seen' => true
                    ),
                    array('date' => 'DESC')
                )));
    }

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

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager','@security.token_storage']
  tags:
        - { name: twig.extension }

public function getUser()
{
    return $this->tokenStorage->getToken()->getUser();
}

获取当前用户：

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager', '@service_container', '@security.context']
  tags:
        - { name: twig.extension }

<?php

namespace Application\Sonata\UserBundle\Twig;

use Doctrine\ORM\EntityManager;
use Symfony\Component\Security\Core\Authentication\Token\Storage\TokenStorage;
use Twig_Extension;
use Symfony\Component\DependencyInjection\ContainerInterface;
use Symfony\Component\Security\Core\SecurityContext;
use Symfony\Component\Security\Core\Security;

class NotificationExtension extends \Twig_Extension
{
    protected $container;
    protected $em;

    public function __construct(EntityManager $em,ContainerInterface $container, SecurityContext $context)
    {
        $this->container = $container;
        $this->em = $em;
        $this->doctrine = $container->get('doctrine');
        $this->context = $context;
    }

    public function getGlobals()
    {
        $user = $this->container->get('security.context')->getToken()->getUser();

        return(array(

            'unreadMessagesCount' => $this->em->getRepository('ApplicationSonataUserBundle:Notif')->findBy(
                    array(
                        'user' => $user,
                        'seen' => true
                    ),
                    array('date' => 'DESC')
                )));
    }

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

notification:
  class: Application\Sonata\UserBundle\Twig\NotificationExtension
  arguments: ['@doctrine.orm.entity_manager','@security.token_storage']
  tags:
        - { name: twig.extension }

public function getUser()
{
    return $this->tokenStorage->getToken()->getUser();
}

将服务定义为全局细枝变量：

# app/config/config.yml
twig:
    # ...
    globals:
        user_notification: '@app.user_notification'

服务类别：

// src/AppBundle/Twig/Globals/UserNotification.php

class UserNotification
{
    private $tokenStorage;
    // ...

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

    public function getUnreadMessages()
    {
        if (null === $token = $this->tokenStorage->getToken()) {
            return array();
        }

        $user = $token->getUser();

        // $unreadMessages = <DB query for get the unread messages from current user>

        return $unreadMessages;
    }
}

最后，对于可以使用此服务的所有模板：

# foo.html.twig

{{ user_notification.unreadMessages|length }}

无论何时在模板中访问全局变量，都将从服务容器请求服务，您可以访问该对象


更多信息
您可以这样访问用户名：app.user.username

如果要检查用户是否已登录，可以使用is_grated twig功能

例如：

尝试使用service
@security.token\u storage
并访问用户身份：
$this->user=（$tokenStorage->getToken（））$tokenStorage->getToken（）->getUser（）：null
当我将您的行放入
公共函数getGlobals（）
时，出现以下错误<代码>注意：未定义变量：tokenStorage

我的意思是在服务定义和类中使用

$tokenStorage

更改您的

SecurityContext$context

。由于通知扩展对象是在请求过程的早期创建的，所以您所拥有的将不起作用，在对用户进行身份验证和加载之前。你需要做的是添加一个函数来获取你的用户数据，然后根据需要从你的小树枝模板调用它。我就是这么做的。我的服务是这样的：

参数：['@doctrine.orm.entity_manager'，'@service_container'，'@security.token_storage']

并且在我的

公共函数uu构造中添加了这个：
TokenStorageInterface$tokenStorage
感谢您的回复。但是在userNotification中，这一行
$user=$token->getUser（）
和此行返回
$unreadMessages未定义。是的，您应该完成这些行，我只向您展示了解决用户问题的提示。您只需要插入entity manager服务并进行查询；）非常感谢你的帮助。我是个新手，有时候简单的事情对我来说可能很难，但我每天都在学习。