每个人总是返回相同的项目

Question

我有一个网站，当您订购2个产品时，它们会被添加到数据库中，因此我知道我有这个模型

    public IQueryable<CommonLayer.Models.OrdersModel> GetOrderAsModel(Guid id)
    {
        return (from p
                in this.Entities.ORDERS
                join orderdetails in this.Entities.ORDERDETAILS on p.OrderId equals orderdetails.OrderDetailsOrderId
                where p.OrderId == id
                select new CommonLayer.Models.OrdersModel()
                {
                    Orderid = p.OrderId,
                    Orderdetailsid = orderdetails.OrderDetailsOrderId,
                    OrderDate = p.OrderDate,
                    Orderstatus = p.OrderStatus,
                    ProductQty = orderdetails.ProductQuantity,
                    OrderNum = p.OrderNum,
                    Userid = p.UserId,
                    ProductName = orderdetails.PRODUCT.ProductName
                });
    }

   This model return the order along with the order details(if for example i have two products i have two orderdetails)

现在我正在尝试添加从订单中更改某些字段的值的功能，并且我正在尝试以特定顺序获取所有产品，如果我有例如它返回的4个产品但它们​​都完全像第一个产品进入即使我有不同的产品，即使数量如果在订单中我有一个产品1和另外5个它返回两个产品同名相同的数量。下面的代码显示了我想要实现的每一个：

@foreach (var item in Model)
{
             <div class="form-group">
                           @Html.LabelFor(model => model.FirstOrDefault().ProductName, htmlAttributes: new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                           @Html.EditorFor(model => model.FirstOrDefault().ProductName, new { htmlAttributes = new { @class = "form-control" } })
                </div>

            </div>

           <div class="form-group">
                         @Html.LabelFor(model => model.FirstOrDefault().ProductQty, htmlAttributes: new { @class = "control-label col-md-2" })
                <div class="col-md-10">
                         @Html.EditorFor(model => model.FirstOrDefault().ProductQty, new { htmlAttributes = new { @class = "form-control" }})
                </div>
            </div>
}