php - Doctrine\ORM\EntityManager，在类 MessageComponentInterface 中未指定

Question

我在我的 symfony 2.8 项目中使用 Ratchet websocket 库。
我的问题是如何定义存在于另一个 Controller 方法中的实体管理器。

class WesocketController implements MessageComponentInterface
{
    protected $clients;

    public function __construct()
    {
        $this->clients = new \SplObjectStorage;
    }

    public function onMessage(ConnectionInterface $from, $msg)
    {
        echo $msg;
        $numRecv = count($this->clients) - 1;
        echo sprintf('Connection %d sending message "%s" to %d other connection%s' . "\n"
            , $from->resourceId, $msg, $numRecv, $numRecv == 1 ? '' : 's');

        $myController = new OtherController();
        $myController->test();

        foreach ($this->clients as $client) {
            if ($from !== $client) {
                // The sender is not the receiver, send to each client connected
                $client->send($msg);
            }
        }
    }
}

我在其他 Controller 中的功能:

public function test()
{
    // echo('yassine');

    $em = $this->getDoctrine()->getManager();

    $newTest = new VisitsTest();
    $newVisitsTest
        ->setTestDate(new \DateTime())
        ->setClient(null);
    $em->persist($newTest);
    $em->flush();
}

错误:

PHP Fatal error:  Uncaught Error: Call to a member function has() on null in MyApp/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php

错误在另一个 Controller 的这一行

$em = $this->getDoctrine()->getManager();

请帮助如何解决这个问题
谢谢

Answer 1

对于 Controller 操作，请考虑 Autowirring your services

public function test(EntityManagerInterface $em){
       $newTest = new VisitsTest();
            $newVisitsTest
                ->setTestDate(new \DateTime())
                ->setClient(null);
            $em->persist($newTest);
            $em->flush();
}

这样，您就不会为您正在调用的每个操作打开一个新的 EntityManager