错误：ITEM_TOTAL_MISMATCH - 当使用贝宝快递订购不止一件商品时

如何解决错误：ITEM_TOTAL_MISMATCH - 当使用贝宝快递订购不止一件商品时

我在电子商务付款中集成贝宝时需要帮助，如果我订购了不止一件商品，则会出现错误：ITEM_TOTAL_MISMATCH，但如果我只订购一件商品，则工作正常。 在这里我提供屏幕截图错误 error paypal

我正在使用 RoR，这是要提供的代码：
- 在我的 HAML 代码上：

#paypal-button
  .order-info{ data: { payable: 'true',debug: 'true',order: { id: order.id,:'custom-id' => order.custom_id,total: order.total_actual,items: order.order_items_for_paypal.to_json,breakdown: order.order_breakdown_for_paypal.to_json }}}

  = form_for :payment,url: payment_finish_path,method: :post,html: { id: 'payment-info' } do |f|
    = f.hidden_field :order_id,value: order.id
    = f.hidden_field :payment_id
    = f.hidden_field :paid_at
    = f.hidden_field :payer_email
    = f.hidden_field :status
    = f.submit :go,class: 'd-none'

• 这是我的 JS 代码：

$.fn.displayPaypalButton = function() {
  var el = this

  if (el.size() > 0) {
    var orderInfo = el.next(".order-info");

    if (orderInfo.data("payable") == true) {
      paypal.Buttons({
        createOrder: function(data,actions) {
          return actions.order.create({
            intent: "CAPTURE",application_context: {
              user_action: "PAY_NOW"
            },purchase_units: [{
              custom_id: orderInfo.data("order-custom-id"),amount: {
                currency_code: "EUR",// value: 100,value: orderInfo.data("order-total"),breakdown: orderInfo.data("order-breakdown")
              },items: orderInfo.data("order-items")
            }]
          });
        },onApprove: function(data,actions) {
          // Capture the funds from the transaction
          return actions.order.capture().then(function(details) {

            var form = $("form#payment-info");

            form.find("#payment_payment_id").val(details.id);
            form.find("#payment_paid_at").val(details.update_time);
            form.find("#payment_payer_email").val(details.payer.email_address);
            form.find("#payment_status").val(details.status);
            form.submit();
          });
        }
      }).render("#" + el.attr("id"));
    }
  }
}

$('#paypal-button').displayPaypalButton()

感谢您的所有帮助。谢谢