如何将内联 Ruby 每个循环放入外部请求中？

Question

我正在使用 Rails 3.1 和 paypal_adaptive (https://github.com/tc/paypal_adaptive) gem 来向 Paypal 发出 API 请求。这是交易：我有一个请求，我在控制器中向 Paypal 提出请求。我有一个项目集合（这里是@items），我正在尝试为该集合中的每个项目添加收件人到该请求。这是我的代码：

pay_request = PaypalAdaptive::Request.new

data = {
  "returnUrl" => "http://testserver.com/payments/completed_payment_request",
  "requestEnvelope" => {"errorLanguage" => "en_US"},
  "currencyCode" => "USD",
  "receiverList" => {"receiver"=>[
    @items.each do |item|
      {"email"=>"#{Recipient.find_by_id(item.recip_id).email}", "amount"=>"#{item.price}"},
    end
  ]},
  "cancelUrl"=>"http://testserver.com/payments/canceled_payment_request",
  "actionType"=>"PAY",
  "ipnNotificationUrl"=>"http://testserver.com/payments/ipn_notification"
}

pay_response = pay_request.pay(data)

if pay_response.success?
  redirect_to pay_response.approve_paypal_payment_url
else
  puts pay_response.errors.first['message']
  redirect_to failed_payment_url
end

...但这不起作用。如何在此请求中正确插入 Ruby 语法？

（抱歉标题含糊不清。我不确定我在提出什么样的请求（也许是 AJAX？））

Answer 1

只需将所有项目收集到一个变量中并将其设置为“接收者”键的值：

recipients = @items.each do |item|
  {"email"=>"#{Recipient.find_by_id(item.recip_id).email}", "amount"=>"#{item.price}"}
end

...

"currencyCode"=>"USD",  
"receiverList"=>{"receiver"=> recipients},
"cancelUrl"=>"http://testserver.com/payments/canceled_payment_request",