PayPal-Ruby-SDK和付款链接

Question

我正在尝试按照有关在此处创建付款的说明进行操作：

https://github.com/paypal/PayPal-Ruby-SDK

所以在我的控制器中，我有：

PayPal::SDK::REST.set_config(
  :mode => "sandbox", # "sandbox" or "live"
  :client_id => "*** My ID ***",
  :client_secret => "*** My Secret ***"
)

@payment = Payment.new({
  :intent =>  "sale",
  :payer =>  {
    :payment_method =>  "paypal" },
  :redirect_urls => {
    :return_url => "http://localhost:3000/checkout/complete",
    :cancel_url => "http://localhost:3000/checkout/canceled" },
  :transactions =>  [{
    :item_list => {
      :items => [{
        :name => "item",
        :sku => "item",
        :price => "10",
        :currency => "EUR",
        :quantity => 1 }]},
    :amount =>  {
      :total =>  "10",
      :currency =>  "EUR" },
    :description =>  "This is the payment transaction description." }]})

@payment.create

目前我不知道接下来会发生什么。我有一个付款对象，我知道我必须以某种方式将它们重定向到Paypal，但是文档中缺少该部分。接下来会发生什么？