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如何在Symfony中的Subscriber中获取entityManager

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我使用Api平台 . 我有订阅者

namespace App\EventSubscriber\Api;

use ApiPlatform\Core\EventListener\EventPriorities;
use App\Entity\Product;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Event\GetResponseForControllerResultEvent;
use Symfony\Component\HttpKernel\KernelEvents;

final class ProductCreateSubscriber implements EventSubscriberInterface
{
    public static function getSubscribedEvents()
    {
        return [
            KernelEvents::VIEW => ['createHost', EventPriorities::POST_WRITE],
        ];
    }

    public function createHost(GetResponseForControllerResultEvent $event)
    {
        $product = $event->getControllerResult();
        $method = $event->getRequest()->getMethod();

        if (!$product instanceof Product || Request::METHOD_POST !== $method) {
            return;
        }

        I NEED ENTITY MANAGER HERE
    }
}

是否可以在这里获得实体经理？

在创建Product之后，我需要创建另一个实体

php symfony api-platform.com

1 回答

  • 1

    Symfony允许（并建议）注入dependencies in services .

    我们向订阅者添加一个构造函数，以便注入Doctrine并通过 $this->entityManager 使其可访问：

    use Doctrine\ORM\EntityManagerInterface;

final class ProductCreateSubscriber implements EventSubscriberInterface
{
    /**
     * @var EntityManagerInterface
     */
    private $entityManager;

    public function __construct(
        EntityManagerInterface $entityManager
    ) {
        $this->entityManager = $entityManager;
    }

    public function createHost(GetResponseForControllerResultEvent $event)
    {
        $product = $event->getControllerResult();
        $method = $event->getRequest()->getMethod();

        if (!$product instanceof Product || Request::METHOD_POST !== $method) {
            return;
        }

        // You can access to the entity manager
        $this->entityManager->persist($myObject);
        $this->entityManager->flush();
    }

    如果启用了autowiring，您将无需执行任何其他操作，该服务将自动实例化 .

    如果没有，你必须declare the service：

    App\EventSubscriber\Api\ProductCreateSubscriber:
    arguments:
        - '@doctrine.orm.entity_manager'
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