Make session expiration redirect back to login?

Question

When user logs in and is authenticated, I use Auth::user()->username; to show username of user on dashboard. However, for some reason when session expires the class Auth doesn't seem to work and dashboard page throws error as trying to get property of non-object for Auth::user()->username;. How can I redirect the user back to the login page when he clicks any link or refreshes the page after the session has expired?

I tried the Authenticate.php middleware but it always redirects back to login page,whatever you put the credentials either correct or incorrect.However,when I don't use this middleware it logins the user.Am I missing something?

Route.php

    <?php

/*
|--------------------------------------------------------------------------
| Application Routes
|--------------------------------------------------------------------------
|
| Here is where you can register all of the routes for an application.
| It's a breeze. Simply tell Laravel the URIs it should respond to
| and give it the controller to call when that URI is requested.
|
*/

/*
Actions Handled By Resource Controller

Verb        Path                    Action      Route Name
GET         /photo                  index       photo.index
GET         /photo/create           create      photo.create
POST        /photo                  store       photo.store
GET         /photo/{photo}          show        photo.show
GET         /photo/{photo}/edit     edit        photo.edit
PUT/PATCH   /photo/{photo}          update      photo.update
DELETE      /photo/{photo}          destroy     photo.destroy


Adding Additional Routes To Resource Controllers

If it becomes necessary to add additional routes to a resource controller beyond the default resource routes, you should define those routes before your call to Route::resource:

Route::get('photos/popular', 'PhotoController@method');

Route::resource('photos', 'PhotoController');

*/

// Display all SQL executed in Eloquent
// Event::listen('illuminate.query', function($query)
// {
//     var_dump($query);
// });



define('ADMIN','admin');
define('SITE','site');


Route::group(['namespace' => ADMIN], function () {
    Route::get('/','UserController@showLogin'); 
});


////////////////////////////////////Routes for backend///////////////////////////////////////////////////
Route::group(['prefix' => ADMIN,'middleware' => 'auth'], function () {
    Route::group(['namespace' => ADMIN], function () {
    //Route::get('/','EshopController@products');

        //sumit routes for user registration
        //Route::resource('users','UserController');
        Route::get('/users/destroy/{id}','UserController@destroy');
        Route::get('UserProf','UserController@userProf');
        Route::get('users','UserController@index');
        Route::get('/users/create','UserController@create');
        Route::get('/users/adminEdit/{id}','UserController@adminEdit');
        Route::post('/users/adminUpdate','UserController@adminUpdate');
        Route::post('/users/store','UserController@store');
        Route::get('/users/edit/{id}','UserController@edit');
        Route::post('/users/update/{id}','UserController@update');

        //airlines route
        Route::get('airlines','AirlinesController@index');
        Route::get('/airlines/create','AirlinesController@create');
        Route::post('/airlines/store','AirlinesController@store');
        Route::get('/airlines/edit/{id}','AirlinesController@edit');
        Route::post('/airlines/update','AirlinesController@update');
        Route::get('/airlines/destroy/{id}','AirlinesController@destroy');
        //end sumit routes

        //flight routes
        Route::get('flights','FlightController@index');
        Route::get('showFlightBook','FlightController@showFlightBook');
        Route::get('flights/create','FlightController@create');
        Route::post('flights/store','FlightController@store');
        Route::get('flights/book','FlightController@book');
        Route::get('flights/edit/{id}','FlightController@edit');
        Route::post('flights/update','FlightController@update');
        Route::get('flights/destroy/{id}','FlightController@destroy');

        //Route::resource('flight','FlightController');

        //hotels route
        Route::get('hotels','HotelsController@index');
        Route::get('/hotels/create','HotelsController@create');
        Route::post('/hotels/store','HotelsController@store');
        Route::get('/hotels/edit/{id}','HotelsController@edit');
        Route::post('/hotels/update','HotelsController@update');
        Route::get('/hotels/destroy/{id}','HotelsController@destroy');
        //end sumit routes

        //book-hotel routes
        Route::get('hotel-book','HotelBookController@index');
        Route::get('showHotelBook','HotelBookController@showHotelBook');
        Route::get('hotel-book/create','HotelBookController@create');
        Route::post('hotel-book/store','HotelBookController@store');
        Route::get('hotel-book/book','HotelBookController@book');
        Route::get('hotel-book/edit/{id}','HotelBookController@edit');
        Route::post('hotel-book/update','HotelBookController@update');
        Route::get('hotel-book/destroy/{id}','HotelBookController@destroy');


        //Route::resource('hotel','HotelController');
        //close flight routes


        //for admin login
        //Route::get('initlogin','UserController@lgnPage');
        Route::get('login','UserController@showLogin');
        // Route::get('privilegeLogin','UserController@privilegeLogin');
        // Route::post('privilegeCheck','UserController@privilegeCheck');
        Route::post('login','UserController@doLogin');
        Route::get('/dashboard','DashController@index');
        Route::get('logout','UserController@doLogout');
        //user login 
        //Route::get('userLogin','UserController@showUserLogin');
        //Route::post('userLogin','UserController@doUserLogin');
        Route::get('/userDashboard','DashController@userIndex');
        Route::get('Logout','UserController@doUserLogout');
        //password reset
        Route::get('forget-pass','UserController@showReset');
        //Route::get('home', 'PassResetEmailController@index');






  });   
});

Route::controllers([
    'auth' => 'Auth\AuthController',
    'password' => 'Auth\PasswordController',
]);

Authenticate.php:

    <?php namespace App\Http\Middleware;

use Closure;
use Illuminate\Contracts\Auth\Guard;

class Authenticate {

    /**
     * The Guard implementation.
     *
     * @var Guard
     */
    protected $auth;

    /**
     * Create a new filter instance.
     *
     * @param  Guard  $auth
     * @return void
     */
    public function __construct(Guard $auth)
    {
        $this->auth = $auth;
    }

    /**
     * Handle an incoming request.
     *
     * @param  \Illuminate\Http\Request  $request
     * @param  \Closure  $next
     * @return mixed
     */
    public function handle($request, Closure $next)
    {
        if ($this->auth->guest())
        {
            if ($request->ajax())
            {
                return response('Unauthorized.', 401);
            }
            else
            {
                // return redirect()->guest('auth/login');
                return redirect()->guest('/');
            }
        }

        return $next($request);
    }

}

Answer 1

All you have to do is just put this constructor at the top of the controller for your dashboard. It seems Laravel has a middleware that handles this already. At least I can confirm from 5.4 and up.

public function __construct()
{
    $this->middleware('auth');
}