讲解Laravel 5.3 构造函数中Session的使用方法

Question

according to laravel docs https://laravel.com/docs/5.3/upgrade#5.3-session-in-constructors i can no longer access the session in the construct because the middleware isnt loaded yet , they provided an example that i couldnt understand

public function __construct()
{
    $this->middleware(function ($request, $next) {
        $this->projects = Auth::user()->projects;

        return $next($request);
    });
}

how do i access my session here inside that function? , an explaination would do

Answer 1

将它放在将处理请求的控制器的__construct()函数中。

Answer 2

The Laravel docs state that you can't access middleware anymore in the constructor, because it hasn't been loaded yet.

By using that specific Closure, you're actually forcing php (and Laravel) to load whatever logic you have in the Closure as middleware. Take a look at the basic controller class provided by Laravel and see if you can connect the dots.

Essentially, you're hacking the framework.

That being said, it's really bad practice and you shouldn't temper with your session in controller's constructors.

Answer 3

 public function __constrcut(){
    //changing language accordding to session
    $this->middleware(function($request,$next){
        app::setLocale(Session::get('locale'));
        return $next($request);
    });

This code used for changing language according to session the version which i use laravel 5.5 Note: you must call the middelware first then use session as the constructor not see session this works for me