试图求和Laravel 5.5中的groupBy值

Question

我向我建议了此代码。我正在尝试总结stock_in_qty和stock_out_qty。

$warehouse1stocks = Warehouse1stocks::select(
                        "order_item_id",
                        Warehouse1stocks::raw('SUM(stock_in_qty) as stock_in_qty'),
                        Warehouse1stocks::raw('SUM(stock_out_qty) as stock_out_qty'))->groupBy('order_item_id')->get();
// dd($warehouse1stocks);
return view("warehouse1.index", compact("warehouse1stocks", $warehouse1stocks));

我的问题是这个错误

我试图从这里的其他问题中寻找答案，我认为我的代码似乎还可以，但是为什么我仍然遇到该错误？

您认为我的代码有什么问题？预先感谢！

Answer 1

代替写作：

UITableView

写：

Warehouse1stocks::raw('SUM(stock_in_qty) as stock_in_qty')

定义写表达式时

Answer 2

使用这个

$warehouse1stocks = Warehouse1stocks::select(
                        "order_item_id",
                        \DB::raw('SUM(stock_in_qty) as stock_in_qty'),
                        \DB::raw('SUM(stock_out_qty) as stock_out_qty'))->groupBy('order_item_id')->get();
// dd($warehouse1stocks);
return view("warehouse1.index", compact("warehouse1stocks", $warehouse1stocks));