Laravel post request with error "TokenMismatchException" - php

Question

I'm getting this TokenMismatchException with Laravel 4.2.
TokenMismatchException will show up when I trying to post request.
For example Login Page.
If I submit that form TokenMismatchException will show up.
Is there any way I can validate all post request submitted ?
Here's the error :
Route::filter('csrf', function()
{
if (Session::token() != Input::get('_token'))
{
throw new Illuminate\Session\TokenMismatchException;
}
});
Here's my code :
route.php
Route::get('login',array('as' => 'login', 'uses' => 'AuthController#getLogin'))->before('guest');
Route::post('login',array('uses' => 'AuthController#postLogin'))->before('csrf');
Route::group(array('before' => 'auth'), function(){
Route::get('dashboard', array('as' => 'panel', 'uses' => 'DashboardController#view_dashboard'));
});
AuthController.php
class AuthController extends Controller {
public function getLogin(){
return View::make('users.login');
}
public function postLogin(){
$rules = array('username' => 'required', 'password' => 'required');
$validator = Validator::make(Input::all(), $rules);
if($validator->fails()){
return Redirect::route('login')->withErrors($validator);
}
$auth = Auth::attempt(array(
'username' => Input::get('username'),
'password' => Input::get('password')
), false);
if(!$auth){
return Redirect::route('login')->withErrors(array(
'Maaf anda bukan sebagai admin..'
));
}
//return "Success";
return Redirect::to('dashboard');
}
}
DashboardController.php
class DashboardController extends Controller {
public function view_dashboard(){
return View::make('dashboard.view_home_admin');
}
}

Answer 1

seems like you don't have hidden csrf field in your form.
try to add this in your form
{{ Form::token() }}