控制器（服务）没有在 Symfony 项目上注入依赖项答案

【问题标题】：Controller (Service) not having dependencies injected on Symfony project控制器（服务）没有在 Symfony 项目上注入依赖项
【发布时间】：2019-02-03 07:20:56
【问题描述】：

我正在使用一些 Symfony 组件（不是框架）并且我试图在我定义为服务的控制器中注入一个依赖项，但是我得到了一个致命的“参数太少错误”，因为没有注入依赖项。

我的组件是 4.2 版。

我的 index.php（前端控制器）

<?php

require_once(__DIR__ . '/../vendor/autoload.php');

use Symfony\Component\Config\FileLocator;
use Symfony\Component\HttpKernel;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\Routing\Exception\ResourceNotFoundException;
use Symfony\Component\Routing\Loader\YamlFileLoader;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;

require_once('../config.php');
require_once('containerBuilder.php');

$fileLocator = new FileLocator([__DIR__]);
$loader = new YamlFileLoader($fileLocator);
$routes = $loader->load('routes.yml');
$request = Request::createFromGlobals();
$context = new RequestContext();
$context->fromRequest($request);
$matcher = new UrlMatcher($routes, $context);
$controllerResolver = new HttpKernel\Controller\ControllerResolver();
$argumentResolver = new HttpKernel\Controller\ArgumentResolver();

try {
  $request->attributes->add($matcher->match($request->getPathInfo()));
  $controller = $controllerResolver->getController($request);
  $arguments = $argumentResolver->getArguments($request, $controller);
  $response = call_user_func_array($controller, $arguments);
} catch (ResourceNotFoundException $e) {
  $response = new Response('Not Found', 404);
} catch (Exception $e) {
  $response = new Response('An error occurred', 500);
}
$response->send();

services.yml

services:
  api_connection.rezdy:
      class: \Site\ApiConnection\RezdyApiConnection
      arguments: []
  controller.api_controller:
      class: \Site\Controller\ApiController
      arguments: ['@api_connection.rezdy']

routes.yml

products:
    path: /products
    defaults: { _controller: '\Site\Controller\ApiController::getProducts' }
product:
    path: /products/{id}
    defaults: { _controller: '\Site\Controller\ApiController::index' }

ApiController.php

    <?php

    namespace Site\Controller;

    use Symfony\Component\HttpFoundation\JsonResponse;
    use Symfony\Component\Yaml\Yaml;
    use Site\ApiConnection\ApiConnectionInterface;

    class ApiController {

      private $connection;

      public function __construct(ApiConnectionInterface $connection) {
        $this->connection = $connection;
      }

      public function getProducts() {
        $details = Yaml::parseFile(WEB_ROOT . '/api_connection_details.yml');
        return new JsonResponse('This is dog');
      }

    }

【问题讨论】：

你试过'\Site→'Site吗？另外，services: > _defaults: > autowire: true?
您的控制器解析器不了解容器，因此它只会新建控制器。将需要更多的工作来集成容器。也许看看框架包的 ControllerResolver 以获得一些想法。
还有一个 HttpKernel\Controller\ContainerControllerResolver 可能会有所帮助。
是的@Cerad 我设法找到了 ContainerControllerResolver 并将我的服务 ID 更改为完全合格的类并且它正在工作。我将在今晚发布解决方案。

标签： symfony

【解决方案1】：

如 cmets 中所述，我必须使用 ContainerControllerResolver 而不是 ControllerResolver，并且我还需要将服务 ID 更新为完全限定的域名。我也开始使用 HttpKernel 来处理控制器逻辑。

index.php

require_once(__DIR__ . '/../vendor/autoload.php');

use Symfony\Component\Config\FileLocator;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Symfony\Component\HttpFoundation\RequestStack;
use Symfony\Component\HttpKernel;
use Symfony\Component\Routing\Loader\YamlFileLoader;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Matcher\UrlMatcher;
use Symfony\Component\Routing\RequestContext;
use Site\Site;

require_once('../config.php');
require_once('containerBuilder.php');

$fileLocator = new FileLocator([__DIR__]);
$loader = new YamlFileLoader($fileLocator);
$routes = $loader->load('routes.yml');
$request = Request::createFromGlobals();
$requestStack = new RequestStack();
$context = new RequestContext();
$context->fromRequest($request);
$matcher = new UrlMatcher($routes, $context);
$controllerResolver = new HttpKernel\Controller\ContainerControllerResolver($container);
$argumentResolver = new HttpKernel\Controller\ArgumentResolver();
$dispatcher = new EventDispatcher();
$dispatcher->addSubscriber(new HttpKernel\EventListener\RouterListener($matcher, $requestStack));
$site = new Site($dispatcher, $controllerResolver, $requestStack, $argumentResolver);
$response = $site->handle($request);
$response->send();

services.yml

services:
  \Site\ApiConnection\RezdyApiConnection:
      class: \Site\ApiConnection\RezdyApiConnection
      arguments: []
  \Site\Controller\ApiController:
      class: \Site\Controller\ApiController
      arguments: ['@\Site\ApiConnection\RezdyApiConnection']

【讨论】：