即使定义了服务，Symfony事件订阅者也不起作用

Question

我有一个活动订阅者：

namespace App\EventListener;

use App\Entity\Token;
use App\Model\EncryptUtils;
use Doctrine\ORM\Event\LifecycleEventArgs;
use Doctrine\Common\EventSubscriber;

class DatabaseSubscriber implements EventSubscriber
{

    public function getSubscribedEvents()
    {
        return array(
            'prePersist'
        );
    }

    public function prePersist(LifecycleEventArgs $args)
    {
        $entity = $args->getObject();

        if ($entity instanceof Token) {
            $enityt->setCreatedAt(new \DateTime());
        }
    }
}

我已经在services.yaml中声明了该服务：     参数：         语言环境：“ en”

services:

    App\EventListener\DatabaseSubscriber:
        tags:
            - { name: doctrine.event_subscriber, connection: default }

    _defaults:
        autowire: true      
        autoconfigure: true
        public: false       

        bind:
            $appSecret: '%kernel.secret%'

    App\:
        resource: '../src/*'
        exclude: '../src/{DependencyInjection,Entity,Migrations,Tests,Kernel.php}'

    App\Controller\:
        resource: '../src/Controller'
        tags: ['controller.service_arguments']

但是无法使其正常工作。我也尝试过使用事件监听器，但是什么也没发生

Answer 1

您应该在所有默认配置之后声明服务，因为如果没有，默认配置将覆盖您的服务。
因此，您的services.yaml文件应为：

services:

    _defaults:
        autowire: true      
        autoconfigure: true
        public: false       

        bind:
            $appSecret: '%kernel.secret%'

    App\:
        resource: '../src/*'
        exclude: '../src/{DependencyInjection,Entity,Migrations,Tests,Kernel.php}'

    App\Controller\:
        resource: '../src/Controller'
        tags: ['controller.service_arguments']

    App\EventListener\DatabaseSubscriber:
        tags:
            - { name: doctrine.event_subscriber, connection: default }