I have the following query:

$items = UserItems::with('item')
        ->where('user_id','=',$this->id)
        ->where('quantity','>',0)
        ->get();

I need to order it by item.type so I tried:

$items = UserItems::with('item')
        ->where('user_id','=',$this->id)
        ->where('quantity','>',0)
        ->orderBy('item.type')
        ->get();

but I get Unknown column 'item.type' in 'order clause'

What I am missing?