php - 如何将 $request 添加到构造方法中？

Question

我在此类的构造方法中定义了Request。

/**
* @var Request
*/
protected $request;

public function __construct(Request $request)
{
    $this->request = $request;
}

现在，当我尝试在类似这样的函数中检索发布数据时:

public function postListsAction()
{
    dd($this->request->get("title"));
}

我收到以下错误:

Cannot autowire service "App\Controller\ListController": argument "$request" of method "__construct()" references class "Symfony\Component\HttpFoundation\Request" but no such service exists.

如何解决这个问题？

Answer 1

正如错误消息所示，您尝试注入(inject)的请求类未声明为服务。使用RequestStack代替:

namespace App\Newsletter;

use Symfony\Component\HttpFoundation\RequestStack;

class NewsletterManager
{
    protected $requestStack;

    public function __construct(RequestStack $requestStack)
    {
        $this->requestStack = $requestStack;
    }

    public function anyMethod()
    {
        $request = $this->requestStack->getCurrentRequest();
        // ... do something with the request
    }
}

问候