Laravel back()->withInput(); not working - laravel

Question

I am currently following a video tutorial on a login form. Here's the code used in case Auth::attempt() fails:
return back()->withInput();
This should return the user to the form and fill out the inputs again (email, password). However the fields stay empty, while login is working correctly.
How can I fix this?
This is my form:
{!! Form::open(array('route' => 'handleLogin')) !!}
<div class="form-group has-feedback">
{!! Form::text('email', null, array('class' => 'form-control', 'placeholder' => 'EMail')) !!}
<span class="glyphicon glyphicon-envelope form-control-feedback"></span>
</div>
<div class="form-group has-feedback">
{!! Form::password('password', array('class' => 'form-control', 'placeholder' => 'Password')) !!}
<span class="glyphicon glyphicon-lock form-control-feedback"></span>
</div>
<div class="row">
<div class="col-xs-8">
<div class="checkbox icheck">
<label>
<input type="checkbox"> Remember Me
</label>
</div>
</div>
<!-- /.col -->
<div class="col-xs-4">
{!! Form::token() !!}
{!! Form::submit(null, array('class' => 'btn btn-primary btn-block btn-flat')) !!}
</div>
<!-- /.col -->
</div>
{!! Form::close() !!}
Edit: Found out that the following code I have works for login but the else statement is not executed when the login credentials are wrong. why?
public function handleLogin(Request $request)
{
$this->validate($request, User::$login_validation_rules);
$data = $request->only('email', 'password');
if(\Auth::attempt($data)){
return redirect()->intended('home');
}else {
return back()->withInput();
}
}

Answer 1

So, as we discussed, the problem is the web middleware. In previous revisions of the Laravel 5.2 framework, if you wanted to enable sessions and error variables, you had to wrap the routes in the web middleware.
As of version 5.2.27, this is not the case anymore, since that middleware group is already applied to all routes, by default.
Knowingly, having version 5.2.27 or later, and using the web middleware group, causes issues with those same variables, common issues are session variables not being passed around, and the $errors variable provided by the class \Illuminate\View\Middleware\ShareErrorsFromSession, that is returned by the Laravel validation API is set, but empty**.
Summary
If you have Laravel 5.2.27 and later, you don't need to wrap the routes in the web middleware group.
If the version is lower than that, then you are required to do so, in order to use session variables and get validation errors.
Sources
https://github.com/laravel/framework/issues/13313
https://laravel.com/docs/5.2/middleware#middleware-groups

Answer 2

Out of the box, Laravel comes with web and api middleware groups that contains common middleware you may want to apply to web UI and your API routes:
App/Http/Kernal.php
protected $middlewareGroups = [
'web' => [
\App\Http\Middleware\EncryptCookies::class,
\Illuminate\Cookie\Middleware\AddQueuedCookiesToResponse::class,
\Illuminate\Session\Middleware\StartSession::class,
\Illuminate\View\Middleware\ShareErrorsFromSession::class,
\App\Http\Middleware\VerifyCsrfToken::class,
],
'api' => [
'throttle:60,1',
'auth:api',
],
];
Take a look at web which contains StartSession and ShareErrorsFromSession which are responsible for session handling so if you want to show validation errors or persist old data then you have to include them in your middleware group. in this case its web.

Answer 3

You Have To make the condiotion if The form has been back with errors, it should been fill out.
The {{old('nom')}} function look for The Previous Filled Value for a given field and echo it.
you can use it as below:
<div class="col-sm-8">
<input type="text"
class="form-control form-control-sm #error('nom') is-invalid #enderror"
id="nom"
name="nom"
placeholder="Ecriver le nom votre ecole "
value="{{old('nom')}}"
>
</div>

Answer 4

try changing
return back()->withInput();
with
return redirect()->back()->withInput(\Input::all()