Laravel 5.2：如何访问请求和来自自己的事件侦听器的会话类？ [英] Laravel 5.2 : How to access Request & Session Classes from own Event Listener?

问题描述

在 Laravel 5.2 中，我添加了我的事件监听器（到$ code> app \Providers\EventServiceProvider.php ），如：

In Laravel 5.2, i have added my Event Listener (into app\Providers\EventServiceProvider.php), like:

protected $listen = [
  'Illuminate\Auth\Events\Login' => ['App\Listeners\UserLoggedIn'],
];

然后生成它：

php artisan event:generate

然后在事件监听器文件本身 app / Listeners / UserLoggedIn.php ，就像：

Then in the Event Listener file itself app/Listeners/UserLoggedIn.php, it's like:

<?php

namespace App\Listeners;

use App\Listeners\Request;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Auth\Events\Login;

class UserLoggedIn
{
    /**
     * Create the event listener.
     *
     * @return void
     */
    public function __construct()
    {

    }

    /**
     * Handle the event.
     *
     * @param  Login  $event
     * @return void
     */
    public function handle(Login $event, Request $request)
    {
        $request->session()->put('test', 'hello world!');
    }
}

这显示了以下错误：

ErrorException in UserLoggedIn.php line 28:
Argument 2 passed to App\Listeners\UserLoggedIn::handle() must be an instance of App\Listeners\Request, none given

我想念了什么，解决这个问题吗？

What did i miss, or how can i solve this please?

• 最终，我需要在用户登录后写入Laravel会话。

谢谢大家。

推荐答案

您正在尝试初始化 App \Listeners\Request; ，但应该是 Illuminate\Http\Request 。另外这可能无效，所以对于计划B使用这个代码：

You are trying to initialize App\Listeners\Request; but it should be Illuminate\Http\Request. Also this might not work, so for plan B use this code:

public function handle(Login $event)
{
    app('request')->session()->put('test', 'hello world!');
}

---

依赖注入更新：

如果要在事件中使用依赖注入，您应该通过构造函数注入类，如下所示：

If You want to use dependency injection in events, You should inject classes through constructor like so:

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

然后在句柄方法您可以使用存储在构造函数中的本地请求变量：

Then in handle method You can use local request variable which was stored in constructor:

public function handle(Login $event)
{
    $this->request->session()->put('test', 'hello world!');
}

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