Session doesn't work in Laravel 5.2 - session

Question

I have a big problem with session in Laravel 5.2. My session doesn't set in some route.
Like this
Route::post('add','SiteController#add');
This is my route.php:
Route::get('admin','AdminController#index');
Route::resource('admin/product','ProcuctController');
Route::resource('admin/news','NewsController');
Route::resource('admin/category','CategoryController');
Route::get('session','SiteController#session');
Route::post('add','SiteController#add');
Route::get('/{title}','SiteController#show');
Route::group(['middleware' => ['web']], function () {
Route::get('session','SiteController#session');
Route::post('add','SiteController#add');
});
My file shopping cms basket doesn't work. This is my SiteController function
public function add(Request $request)
{
if(session::has('cart'))
{
$cart=session::get('cart');
if(array_key_exists($request->product_id,$cart))
{
$cart[$request->product_id]++;
}
else
{
$cart[$request->product_id]=1;
}
session::put('cart',$cart);
//var_dump(session::get('cart'));
print 'ok';
}
else
{
$cart=array();
$cart[$request->product_id]=1;
session::put('cart',$cart);
var_dump(session::get('cart'));
}
}
Every time that I click the buy button, condition doesn't return true

Answer 1

In your router.php you register add and session route twice. one is inside of web middleware and another is outside. Remove the outside one. so your router.php will look like
Route::get('admin','AdminController#index');
Route::resource('admin/product','ProcuctController');
Route::resource('admin/news','NewsController');
Route::resource('admin/category','CategoryController');
Route::get('/{title}','SiteController#show');
Route::group(['middleware' => ['web']], function () {
Route::get('session','SiteController#session');
Route::post('add','SiteController#add');
});
And in your SiteController add this line in to top
use session;