mysql - Eloquent 枢轴 : how to do select columns in Laravel 5. 1

Question

我有两个模型 Bill 和 Order，我可以通过以下方式获取订单记录:

    $orders = $bill->orders;

但我想像这样使用选择:

 $orders = $bill->orders->select([
                            'orders.*',                            
                            \DB::raw('sum(orders.quantity) as qty'),
                            \DB::raw('sum(orders.price) as  total')                            
                            ]) 
                            ->groupBy('article_id');

我收到此错误:

Method select does not exist.

请大家帮帮我，谢谢!

Answer 1

我找到了解决方案:D

像这样编辑它:

 $orders = $bill->orders()->select([
                        'orders.*',                            
                        \DB::raw('sum(orders.quantity) as qty'),
                        \DB::raw('sum(orders.price) as  total')                            
                        ]) 
                        ->groupBy('article_id')->get();

没关系:)))