Symfony 6多上下文项目控制器构造函数依赖注入失败求助

错误信息 #

控制器存在必填构造函数参数，但未在容器中注册。你是否忘记将控制器定义为服务？

问题描述 #

基于Symfony 6开发多上下文项目（每个上下文有独立内核、路由、服务），尝试向控制器构造函数注入依赖时失败，返回上述错误。

相关配置与代码 #

Composer.json #

{
    "psr-4": {
        "CourtsReservationApp\\Context\\Backoffice\\Backend\\": "context/backoffice/backend/src",
        "CourtsReservationApp\\": ["src"]
    }
}

RandomNumberGenerator 接口 #

<?php
namespace CourtsReservationApp\Backoffice\Domain;

interface RandomNumberGenerator
{
    public function generate(): int;
}

RandomNumberGenerator 实现类 #

<?php
declare(strict_types=1);

namespace CourtsReservationApp\Backoffice\Infrastructure;

use CourtsReservationApp\Backoffice\Domain\RandomNumberGenerator;

final class PhpRandomNumberGenerator implements RandomNumberGenerator
{
    public function generate(): int
    {
        return random_int(1, 5);
    }
}

控制器代码 #

<?php

namespace CourtsReservationApp\Context\Backoffice\Backend\Controller\HealthCheck;

use CourtsReservationApp\Backoffice\Domain\RandomNumberGenerator;
use Symfony\Component\HttpFoundation\JsonResponse;

class HealthCheckGetController
{
    public function __construct(private RandomNumberGenerator $generator)
    {
    }

    public function index()
    {
        return new JsonResponse([
            'success' => true,
            "number" => $this->generator->generate()
        ]);
    }
}

services.yaml #

parameters: null
services:
    _defaults:
        autowire: true
        autoconfigure: true
        
    CourtsReservationApp\Context\Backoffice\Backend\Controller\:
        resource: '../src/Controller/'
        tags: ['controller.service_arguments']
        
    CourtsReservationApp\Backend\:
        resource: '../../../../src/*'

BackofficeKernel #

<?php
declare(strict_types=1);

namespace CourtsReservationApp\Context\Backoffice\Backend;

use Symfony\Bundle\FrameworkBundle\Kernel\MicroKernelTrait;
use Symfony\Component\Config\Loader\LoaderInterface;
use Symfony\Component\Config\Resource\FileResource;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\HttpKernel\Kernel;
use Symfony\Component\Routing\Loader\Configurator\RoutingConfigurator;

final class BackofficeBackendKernel extends Kernel
{
    use MicroKernelTrait;

    private const CONFIG_EXTS = ".{xml, yaml, yml}";

    public function getProjectDir(): string
    {
        return dirname(__DIR__);
    }

    public function registerBundles(): iterable
    {
        $contents = require $this->getProjectDir() . '/config/bundles.php';
        foreach ($contents as $class => $envs) {
            if ($envs[$this->environment] ?? $envs['all'] ?? false) {
                yield new $class();
            }
        }
    }

    protected function configureRoutes(RoutingConfigurator $routes): void
    {
        $confDir = $this->getProjectDir() . '/config';

        $routes->import($confDir.'/{routes}/'.$this->environment.'/*.yaml');
        $routes->import($confDir.'/{routes}/*.yaml');
    }

    protected function configureContainer(ContainerBuilder $container, LoaderInterface $loader):void
    {
        $container->addResource(new FileResource($this->getProjectDir() . '/config/bundles.php'));
        $container->setParameter('container.dumper.inline_class_loader', true);
        $confDir = $this->getProjectDir() . '/config';

        $loader->load($confDir . '/services' . self::CONFIG_EXTS, 'glob');
        //$loader->load($confDir . '/services_' . $this->environment . self::CONFIG_EXTS, 'glob');
        //$loader->load($confDir . '/services/*' . self::CONFIG_EXTS, 'glob');
    }
}

已尝试操作 #

• 执行composer dump-autoload
• 执行bin/console cache:clear
• 删除var/cache目录

解决方案 #

1. 修正services.yaml中的命名空间错误 #

当前services.yaml里的CourtsReservationApp\Backend\:命名空间与实际代码结构不符，改为CourtsReservationApp\Backoffice\:才能覆盖接口和实现类所在目录：

parameters: null
services:
    _defaults:
        autowire: true
        autoconfigure: true
        
    CourtsReservationApp\Context\Backoffice\Backend\Controller\:
        resource: '../src/Controller/'
        tags: ['controller.service_arguments']
        
    # 修正命名空间，匹配实际代码结构
    CourtsReservationApp\Backoffice\:
        resource: '../../../../src/*'

2. 显式绑定接口到实现类（可选） #

为确保Symfony能正确解析接口对应的实现，可在services.yaml中添加显式绑定：

services:
    # ... 保留原有配置 ...
    
    # 绑定RandomNumberGenerator接口到对应的实现类
    CourtsReservationApp\Backoffice\Domain\RandomNumberGenerator:
        class: CourtsReservationApp\Backoffice\Infrastructure\PhpRandomNumberGenerator

3. 重新清理缓存与自动加载 #

执行以下命令确保配置生效：

bin/console cache:clear
composer dump-autoload

内容的提问来源于stack exchange，提问作者Raul Perez