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<p>I have a base controller class that contains some utility methods that all child controllers use. Currently it has 3 dependencies, but there may be more in the future. So whenever I want to add a dependency to a child controller, I now have an issue where I think there are too many directives for dependency injection. </p> <pre class="brush:php;toolbar:false;">abstract class BaseController extends AbstractController { public function __construct( protected readonly SerializerInterface $serializer, protected readonly ValidatorInterface $validator, private readonly ResponseGenerator $responseGenerator, ) { } ... } class ChildController extends BaseController { // All parent class injections are required in all child classes. public function __construct( SerializerInterface $serializer, ValidatorInterface $validator, ResponseGenerator $responseGenerator, private readonly SomeRepository $someRepository, ...insert any other child controller-specific dependencies here. ) { parent::__construct($serializer, $validator, $responseGenerator); } ... }</pre> <p>I tried using <code>$this->container->get('serializer')</code> in the base controller, but that didn't work because <code>AbstractController: :$container</code> is defined through injection, but has no constructor, so <code>parent::__construct()</code> cannot be called. Also, it doesn't give me a <code>validator</code>, so even if it works, it only solves part of the problem. </p> <p>I tried looking for properties that I could use, like </p> <pre class="brush:php;toolbar:false;">abstract class BaseController extends AbstractController { #[Inject] protected readonly SerializerInterface $serializer; #[Inject] protected readonly ValidatorInterface $validator;</pre> <p>But nothing similar was found (PHP-DI has it, but Symfony doesn't). </p> <p>Is there a way to somehow eliminate duplicate dependencies in child controllers? </p>

<?php

use Symfony\Contracts\Service\ServiceSubscriberInterface;


class ParentController implement ServiceSubscriberInterface {
    protected ContainerInterface $container;
    public function setContainer(ContainerInterface) { $this->container = $container; } 

    public static function getSubscribedServices() {
         // 這是靜態(tài)的，所以Symfony可以在不實例化控制器的情況下“看到”所需的服務(wù)。
         // 在這里定義一些常見的服務(wù)，一個示例在Symfony的AbstractController中
    }
}

class ChildController extends ParentController {
    // 使用自定義DI來為子控制器提供服務(wù)。

    public function indexAction {
        // 你可以使用$this->container->get(...)來獲取服務(wù)
    }

}