【问题标题】：Error TypeError: can't dup NilClass - Stripe错误类型错误：无法复制 NilClass - Stripe
【发布时间】：2016-05-27 11:42:33
【问题描述】：

在处理剥离费用时，我收到错误 ERROR TypeError: can't dup NilClass。我遵循了 rails stripe integration 文档。

来自终端的错误是：

    Started POST "/charges" for ::1 at 2016-05-27 12:35:48 +0100
Processing by ChargesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"URydkbi6DghMZnzVqbf79KU+YRy/T+9g3UQ8tO8HTXG4uqvEMzdm6V/EjseNiZiIPS3ziOJJTpJ1K+gGMipksg==", "stripeToken"=>"tok_18FjA2JxArkI2Z35Q4MB3sCE", "stripeTokenType"=>"card", "stripeEmail"=>"fergusmorton@live.com"}
[2016-05-27 12:35:48] ERROR TypeError: can't dup NilClass
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httprequest.rb:392:in `dup'
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httprequest.rb:392:in `meta_vars'
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:59:in `service'
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
        C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'
Completed 500 Internal Server Error in 55ms (ActiveRecord: 0.0ms)

Net::HTTPFatalError (500 "Internal Server Error "):
  app/controllers/charges_controller.rb:9:in `create'



Net::HTTPFatalError: 500 "Internal Server Error "
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/http/response.rb:119:in `error!'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/http/response.rb:128:in `value'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/http.rb:915:in `connect'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/http.rb:863:in `do_start'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/net/http.rb:852:in `start'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0-x86-mingw32/lib/restclient/request.rb:413:in `transmit'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0-x86-mingw32/lib/restclient/request.rb:176:in `execute'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rest-client-1.8.0-x86-mingw32/lib/restclient/request.rb:41:in `execute'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/stripe-1.43.0/lib/stripe.rb:298:in `execute_request'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/stripe-1.43.0/lib/stripe.rb:196:in `execute_request_with_rescues'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/stripe-1.43.0/lib/stripe.rb:148:in `request'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/stripe-1.43.0/lib/stripe/api_operations/request.rb:15:in `request'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/stripe-1.43.0/lib/stripe/api_operations/create.rb:5:in `create'
        from C:/Users/Fergus/best-ever-me-v-1.1/app/controllers/charges_controller.rb:9:in `create'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/implicit_render.rb:4:in `send_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/abstract_controller/base.rb:198:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/rendering.rb:10:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/abstract_controller/callbacks.rb:20:in `block in process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:117:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:117:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:555:in `block (2 levels) in compile'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:505:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:505:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:92:in `__run_callbacks__'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:778:in `_run_process_action_callbacks'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:81:in `run_callbacks'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/abstract_controller/callbacks.rb:19:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/rescue.rb:29:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/instrumentation.rb:32:in `block in process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/notifications.rb:164:in `block in instrument'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/notifications/instrumenter.rb:20:in `instrument'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/notifications.rb:164:in `instrument'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/instrumentation.rb:30:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/params_wrapper.rb:250:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.2.5/lib/active_record/railties/controller_runtime.rb:18:in `process_action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/abstract_controller/base.rb:137:in `process'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionview-4.2.5/lib/action_view/rendering.rb:30:in `process'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal.rb:196:in `dispatch'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal/rack_delegation.rb:13:in `dispatch'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_controller/metal.rb:237:in `block in action'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:76:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:76:in `dispatch'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:45:in `serve'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:43:in `block in serve'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:30:in `each'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/journey/router.rb:30:in `serve'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/routing/route_set.rb:817:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/etag.rb:24:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/conditionalget.rb:38:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/head.rb:13:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/params_parser.rb:27:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/flash.rb:260:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:225:in `context'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/session/abstract/id.rb:220:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/cookies.rb:560:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.2.5/lib/active_record/query_cache.rb:36:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.2.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:653:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activerecord-4.2.5/lib/active_record/migration.rb:377:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/callbacks.rb:29:in `block in call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:88:in `__run_callbacks__'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:778:in `_run_call_callbacks'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/callbacks.rb:81:in `run_callbacks'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/callbacks.rb:27:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/reloader.rb:73:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/remote_ip.rb:78:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/debug_exceptions.rb:17:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/web-console-2.3.0/lib/web_console/middleware.rb:28:in `block in call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/web-console-2.3.0/lib/web_console/middleware.rb:18:in `catch'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/web-console-2.3.0/lib/web_console/middleware.rb:18:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/show_exceptions.rb:30:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/rack/logger.rb:38:in `call_app'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/rack/logger.rb:20:in `block in call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/tagged_logging.rb:68:in `block in tagged'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/tagged_logging.rb:26:in `tagged'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/tagged_logging.rb:68:in `tagged'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/rack/logger.rb:20:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/request_id.rb:21:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/methodoverride.rb:22:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/runtime.rb:18:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/activesupport-4.2.5/lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/lock.rb:17:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/actionpack-4.2.5/lib/action_dispatch/middleware/static.rb:116:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/sendfile.rb:113:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/engine.rb:518:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/railties-4.2.5/lib/rails/application.rb:165:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/lock.rb:17:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/content_length.rb:15:in `call'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/gems/2.1.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:88:in `service'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/httpserver.rb:94:in `run'
        from C:/RailsInstaller/Ruby2.1.0/lib/ruby/2.1.0/webrick/server.rb:295:in `block in start_thread'

charges_controller.rb

    class ChargesController < ApplicationController
    def new
end

def create
  # Amount in cents
  @amount = 500

  customer = Stripe::Customer.create(
    :email => params[:stripeEmail],
    :source  => params[:stripeToken]
  )

  charge = Stripe::Charge.create(
    :customer    => customer.id,
    :amount      => @amount,
    :description => 'Rails Stripe customer',
    :currency    => 'usd'
  )

rescue Stripe::CardError => e
  flash[:error] = e.message
  redirect_to new_charge_path
end
end

初始化器/stripe.rb

    Rails.configuration.stripe = {
  :publishable_key => ENV['PUBLISHABLE_KEY'],
  :secret_key      => ENV['SECRET_KEY']
}

Stripe.api_key = Rails.configuration.stripe[:secret_key]

cart/show.html.erb

    <div class="shopping-cart" style="margin-top:160px;">
  <%= render "shopping_cart" %>
  <%= form_tag charges_path do %>
  <article>
    <% if flash[:error].present? %>
      <div id="error_explanation">
        <p><%= flash[:error] %></p>
      </div>
    <% end %>
    <label class="amount">
      <span>Amount: €<%= current_order.subtotal %> </span>
    </label>
  </article>

  <script src="https://checkout.stripe.com/checkout.js" class="stripe-button"
          data-key="<%= Rails.configuration.stripe[:publishable_key] %>"
          data-description="Cart Total"
          data-amount="<%= current_order.subtotal %>"
          data-locale="auto"></script>
<% end %>
</div>

根据迈克尔的建议更新了日志。

 Started POST "/charges" for ::1 at 2016-05-31 11:45:45 +0100
Processing by ChargesController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"qXPL5OhG1UA+Ui4uyB7+80/UGDGXFPnOevOf/kmZhitA1f2xY8u9oS3w3DzsIJ2P18eKpcoSWDzSnEtMlLSv6A==", "stripeToken"=>"tok_18HANXJxArkI2Z35encjc3uW", "stripeTokenType"=>"card", "stripeEmail"=>"fergusmorton@live.com"}
Unpermitted parameters: utf8, authenticity_token, stripeTokenType
Completed 500 Internal Server Error in 6ms (ActiveRecord: 0.0ms)

NoMethodError (undefined method `stripe_customer_id' for nil:NilClass):
  app/controllers/charges_controller.rb:15:in `create'



NoMethodError: undefined method `stripe_customer_id' for nil:NilClass

【问题讨论】：

标签： ruby ruby-on-rails-4 webrick

【解决方案1】：

从您显示的代码看来，您可能有几个问题，但可能还有与设置 Stripe Payment 有关的其他问题。

此处介绍了在您的应用程序中设置 Stripe 的过程。

在您的应用程序中设置 Stripe

将 Stripe 键添加到您的 config/secrets.yml 文件中：

development:
  stripe_private_key: <%= ENV["STRIPE_PRIVATE_KEY"] %>
  stripe_public_key: <%= ENV["STRIPE_PUBLIC_KEY"] %>

您可以将 STRIPE_PRIVATE_KEY 和 STRIPE_PUBLIC_KEY 保留在您的环境中。测试和生产环境需要类似的配置设置。

确保将此代码添加到您的控制器或您打算使用 Stripe API 的任何代码中：

require "stripe"
Stripe.api_key = Rails.application.secrets.stripe_private_key

添加迁移以将 Stripe Customer ID 添加到客户

此迁移提供了一个基于 User 类的示例；您的应用程序可能使用不同的模型，因此请根据需要进行调整以适应您的目的。

class AddUserStripeCustomerId < ActiveRecord::Migration
  def change
    change_table :users do |t|
      t.string :stripe_customer_id, limit: 50, null: true
    end
  end
end

创建客户

当您准备好为客户开始计费流程时，创建客户：

if !@user.stripe_customer_id
  customer = Stripe::Customer.create(
    :email => stripe_details[:stripeEmail],
    :source  => stripe_details[:stripeToken]
  )

  User.update(stripe_customer_id: customer)
end

确保将客户 ID 保存在您的用户模型中。您需要注意不要为用户重新创建和覆盖您的客户 ID，因为这是您与该用户的 Stripe 支付系统的绑定。

实现控制器

您提交的表单元素（参数）的范围不像基于 Rails 模型的表单。通常，这是由于将form_tag 用于不直接基于模型的表单。这意味着参数不是由模型散列限定范围的，而是无范围的。

此处未包含您的强参数，但它们可能是问题的一部分。确保 stripeToken 和 stripeEmail 包含在 permit 列表中，如下所示：

params.permit(:stripeToken, :stripeCard, :stripeEmail)

确保不在强参数上包含典型的require 方法，因为这可以验证参数是否由模型对象限定。在您的create 方法中，您应该调用强参数方法，并使用结果，如下所示：

require "stripe"

class ChargesController < ApplicationController
  Stripe.api_key = Rails.application.secrets.stripe_private_key

  def new
  end

  def create
    # Amount in cents
    @amount = 500

    stripe_details = stripe_params

    if !@user.stripe_customer_id
      customer = Stripe::Customer.create(
        :email => stripe_details[:stripeEmail],
        :source  => stripe_details[:stripeToken]
      )

      User.update(stripe_customer_id: customer)
    end

    charge = Stripe::Charge.create(
      :customer    => customer.id,
      :amount      => @amount,
      :description => 'Rails Stripe customer',
      :currency    => 'usd'
    )

  rescue Stripe::CardError => e
    flash[:error] = e.message
    redirect_to new_charge_path
  end

private
  def stripe_params
    params.permit(:stripeToken, :stripeCard, :stripeEmail)
  end
end

在您的应用程序中设置 Stripe

添加迁移以将 Stripe Customer ID 添加到客户

创建客户

实现控制器

更多信息