Symfony 4.4事件侦听器错误（MongoDB）

我正在尝试创建一个侦听器，以便在创建新的分级时使用。我遵循了所有的文档，但我一直得到相同的错误： 传递给“Symfony\Component\EventDispatcher\EventDispatcherInterface:：dispatch（）”的参数1必须是给定的“Symfony\Component\EventDispatcher\Event”、“App\Event\AverageEvent”的实例

我试图在事件中使用Symfony\Component\EventDispatcher\Event，但它一直说它已被弃用，并且根据文档使用Symfony\Contracts\EventDispatcher\Event

我在服务中注册我的事件，下面是我的事件、eventlistener和类

等级评定

class RatingApiController extends AbstractController
{
        
    /**
     * @Route("api/rating/create", name="CreateRating",  methods={"POST"})
     * @param DocumentManager $dm
     * @param Request $request
     * @param EventDispatcher $eventDispatcher
     * @return RedirectResponse|Response
     * @throws MongoDBException
     * 
     */
    public function addRating(Request $request, EventDispatcherInterface $eventDispatcher)
    {
        $response = [];

        $form = $this->
        createForm(RatingType::class, new Rating() ,array('csrf_protection' => false));  
        
        $request = json_decode($request->getContent(), true);
        
        
        $form->submit($request);

        if($form->isSubmitted() && $form->isValid())
        {
        
           $rating = $form->getData();

           $this->documentManager->persist($rating);
           $this->documentManager->flush();
           
           $averageRatingEvent = new AverageRatingEvent($rating);
           $eventDispatcher->dispatch( AverageRatingEvent::NAME, $averageRatingEvent);
            

           $status = 200;
           $response = ["status" => $status, "success" => true, "data" => $rating->getId()];
           // return $this->redirectToRoute('rating_list'); 
       }



}

事件

<?php
namespace App\Event;

use App\Document\Rating;
use Symfony\Contracts\EventDispatcher\Event;

class AverageRatingEvent extends Event
{
    /**
     * @var Rating $rating
     */
    protected $rating;

    public const NAME = "average.rating";
    
    public function __construct(Rating $rating)
    {
        $this->rating = $rating;        
    }

    public function getRating()
    {
        return $this->rating;
    }
    
}

---

在AverageRatingEvent中扩展事件

用途需要从

use Symfony\Contracts\EventDispatcher\Event;

到

条令事件和Symfony事件是两件不同的事情，您不需要分派sf事件来使用条令事件。顺便说一下，您的
dispatch
参数是反向的：
dispatch（$averageRatingEvent，averageRatingEvent:：NAME）。
use Symfony\Contracts\EventDispatcher\Event;

use Symfony\Component\EventDispatcher\Event;