Laravel 5.2：如何从自己的事件侦听器访问请求和会话类？
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Laravel 5.2 : How to access Request & Session Classes from own Event Listener?
提问by u775856
In Laravel 5.2, i have added my Event Listener (into app\Providers\EventServiceProvider.php), like:
在 中Laravel 5.2，我添加了我的事件侦听器（到app\Providers\EventServiceProvider.php），例如：
protected $listen = [
'Illuminate\Auth\Events\Login' => ['App\Listeners\UserLoggedIn'],
];
Then generated it:
然后生成它：
php artisan event:generate
Then in the Event Listener file itself app/Listeners/UserLoggedIn.php, it's like:
然后在事件侦听器文件本身中app/Listeners/UserLoggedIn.php，它就像：
<?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!');
}
}
This shows me following Errors:
这向我显示了以下错误：
ErrorException in UserLoggedIn.php line 28:
Argument 2 passed to App\Listeners\UserLoggedIn::handle() must be an instance of App\Listeners\Request, none given
What did i miss, or how can i solve this please?
我错过了什么，或者我该如何解决这个问题？
- Ultimately, i need to write into Laravel Sessions once the User has logged in.
- 最终，我需要在用户登录后写入 Laravel Sessions。
Thank you all.
谢谢你们。
回答by Giedrius Kir?ys
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:
您正在尝试初始化，App\Listeners\Request;但它应该是Illuminate\Http\Request。这也可能不起作用，因此对于计划 B，请使用以下代码：
public function handle(Login $event)
{
app('request')->session()->put('test', 'hello world!');
}
Dependency Injection Update:
依赖注入更新：
If You want to use dependency injection in events, You should inject classes through constructor like so:
如果你想在事件中使用依赖注入，你应该通过构造函数注入类，如下所示：
public function __construct(Request $request)
{
$this->request = $request;
}
Then in handlemethod You can use local request variable which was stored in constructor:
然后在handle方法中您可以使用存储在构造函数中的本地请求变量：
public function handle(Login $event)
{
$this->request->session()->put('test', 'hello world!');
}
