php - symfony 中的构造函数注入(inject)

Question

我想在我的构造函数中使用 Request 类，这是它在我想运行服务器时给我的错误:

Cannot autowire service "AppBundle\Controller\DetectServiceDetailController": argument "$request" of method "__construct()" references class "Symfony\Component\HttpFoundation\Request" but no such service exists. It cannot be auto-registered because it is from a different root namespace.

我的代码:

<?php

namespace AppBundle\Controller;

use Symfony\Component\HttpFoundation\Request;

class DetectServiceDetailController
{
    public $request;

    public function __construct(Request $request)
    {
        $this->request = $request;
        $serviceType = $this->request->query->get('type');
        return $serviceType;

    }

}

Answer 1

根据 gp_sflover 的建议，这里是我在 Symfony 3.4 中使用的一段代码:

<?php

namespace AppBundle\Controller;

use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\RequestStack;

class BaseController extends Controller
{
    protected $request;

    /**
     * @param Symfony\Bundle\FrameworkBundle\Controller\Controller
     */
    public function __construct(RequestStack $requestStack)
    {
        $this->request = $requestStack->getCurrentRequest();
    }

    ...

在我的例子中，BaseController 扩展了 Controller，所以我不需要更新 services.yml，但如果这是独立服务，那么你需要将它添加到 services.yml，例如

services:
    ...
    service_name:
        class: AppBundle\Service\ServiceName
        arguments:
            - '@request_stack'
        public: true

只需为经验不足的开发人员添加它;-)