请参见here:
Session In The Constructor
In previous versions of Laravel, you could access session variables or
the authenticated user in your controller's constructor. This was
never intended to be an explicit feature of the framework. In Laravel
5.3, you can't access the session or authenticated user in your controller's constructor because the middleware has not run yet.
作为替代方案,您可以直接定义基于闭包的中间件
<?php
namespace App\Http\Controllers;
use App\User;
use Illuminate\Support\Facades\Auth;
use App\Http\Controllers\Controller;
class ProjectController extends Controller
{
/**
* All of the current user's projects.
*/
protected $projects;
/**
* Create a new controller instance.
*
* @return void
*/
public function __construct()
{
$this->middleware(function ($request, $next) {
$this->projects = Auth::user()->projects;
return $next($request);
});
}
}
当然,您也可以访问请求会话数据或
/**
* Show all of the projects for the current user.
*
* @param \Illuminate\Http\Request $request
* @return Response
*/
public function index(Request $request)
{
$projects = $request->user()->projects;
$value = $request->session()->get('key');
//
}