update database value on laravel

does laravel have short cut for $i++; i want to update my database value went seomething happend. on php i could just use sql like

UPDATE goods SET qty++ WHERE id = '4' 

this are my controller

public function store(Request $request)
{
      $g = new goods();
      $g->qty = ++;
      $g->save;
}

via Chebli Mohamed