laravel - Can't get session in controller constructor

Question

In new laravel I can\'t get session in constructor. Why?

public function __construct()
{
    dd(Session::all()); //this is empty array
}

a

Answer 1

 *This one solved mine problem to use session in constructor* 
   $this->middleware(function ($request, $next) {
        if (!session('records_per_page')) {
            session(['records_per_page' => 20]);
        }

        // update rows per page
        if (!empty(\Request::get('records_per_page')) && in_array(\Request::get('records_per_page'), [20, 50, 80, 100])) {
            session(['records_per_page' => \Request::get('records_per_page')]);
        }
        return $next($request);
    });