如何使用多个输入保存数据

Question

  

错误：数组到字符串的转换（SQL：插入到order_product（jml，order_id，product_id中）的值是（4，23，11），（4， 23，11））

控制器

public function store(Request $request)
{
    $newOrder = new \App\Order;
    $newOrder->name = $request->get('name');
    $newOrder->created_by = \Auth::user()->id;
    $newOrder->save();

    $jml = $request->get('jml');
    $products = $request->get('product');
    $newOrder->products()->attach($products, ['jml'=>$jml]);
    $dt = $newOrder;

    return view('order.details', ['data'=>$dt]);
}