Ruby on Rails paypal快递运费

Question

我遇到了RoR Active Merchant Express Gateway的问题。我想向客户付款添加运费。 ：运费已设定。在测试模式下所有工作，但在生产中没有。 Paypal显示全部费用（小计+运费），但在整个过程后，我的结算费用不收取运费。

config.after_initialize do
ActiveMerchant::Billing::Base.mode = :production
paypal_options = {
  login: "paypal-api-login",
  password: "paypal-api-password",
  signature: "paypal-api-signature"
}
::EXPRESS_GATEWAY = ActiveMerchant::Billing::PaypalExpressGateway.new(paypal_options)

然后订购功能：

@order = Order.new(order_params)
if @order.save      
  fill_order
  response = EXPRESS_GATEWAY
  .setup_purchase((paypal_total_amount_in_cents.to_i + paypal_shipping.to_i),
                  ip: request.remote_ip,
                  return_url: confirm_orders_url,
                  cancel_return_url: cart_url,
                  currency: "GBP",
                  allow_guest_checkout: true,
                  :subtotal => paypal_total_amount_in_cents.to_i,
                  :shipping => paypal_shipping.to_i,
                  :tax => 0.to_i,
                  :handling => 0.to_i,
                  items: paypal_items
                 )
  @order.update(express_token: response.token, user: current_user, delivery: @delivery)
  @order.created!
  redirect_to EXPRESS_GATEWAY.redirect_url_for(response.token)
else
  failure if not @order.save
end

Paypal显示价格不错。它表明运费会加到价格中，但付款后运费不会计入总费用。