小编Fra*_*let的帖子

我正在使用Stripe和Ruby on Rails 3.2构建一个小概念证明.到目前为止,我已经看过如何在RoR应用程序中实现Stripe的Railscast,它的工作非常好.

我已经按照RailsCast#288 Billing with Stripe构建了我的应用程序.现在,我的用户可以添加和编辑他们的信用卡,甚至可以注册到课程,并在完成后通过信用卡收费.

现在我一直在使用Stripe的众多测试信用卡进行测试,我想在提出时捕获尽可能多的异常.我正在注册模型中使用Stripe的示例错误,如下所示:

class Registration < ActiveRecord::Base

  belongs_to :user
  belongs_to :session

  attr_accessible :session_id, :user_id, :session, :user, :stripe_payment_id
  validates :user_id, :uniqueness => {:scope => :session_id}

  def save_with_payment(user, stripe_card_token)
    if valid?
      if user.stripe_customer_id.present?
        charge = Stripe::Charge.create(
            :customer => user.stripe_customer_id,
            :amount => self.session.price.to_i * 100,
            :description => "Registration for #{self.session.name} (Id:#{self.session.id})",
            :currency => 'cad'
        )
      else
        customer = Stripe::Customer.create(
            :email => user.email,
            :card => stripe_card_token,
            :description => user.name
        )
        charge = …

我正在尝试添加FactoryGirl支持我的控制器中的默认脚手架规格,我似乎无法找到正确的语法.

这是一个示例测试:

describe "POST create" do
    describe "with valid params" do
   it "creates a new Course" do
        expect {
          post :create, {:course => valid_attributes}, valid_session
        }.to change(Course, :count).by(1)
      end
do

我替换为:

describe "POST create" do
    describe "with valid params" do
      it "creates a new Course" do
        expect {
          post :create, course: FactoryGirl.build(:course)
        }.to change(Course, :count).by(1)
      end
do

规格/工厂/ courses.rb

FactoryGirl.define do
  factory :course do
    association :provider
    name "Course name"
    description "course description"
  end
end

应用程序/模型/ course.rb

class Course < ActiveRecord::Base …

我正在使用Ruby on Rails和Stripe构建一个小型支付处理模块以获得乐趣,我想知道这个方法(用于检查给定用户是否已经使用Stripe存档的卡)可以重构:

class User < ActiveRecord::Base
...
def has_card?
    customer = Stripe::Customer.retrieve(self.stripe_customer_id)
    if customer.cards.count > 0
      true
    else
      false
    end
  end
end

我认为这if句话看起来很傻但无法解释为什么(我白天不是开发人员,我只是涉猎)

我目前正在查看优秀的Rails-composer中的一段代码,我不明白第3行中的Embedded Ruby是做什么的:

<% flash.each do |name, msg| %>
  <% if msg.is_a?(String) %>
    <div class="alert alert-<%= name == :notice ? "success" : "error" %>">
      <a class="close" data-dismiss="alert">&#215;</a>
      <%= content_tag :div, msg, :id => "flash_#{name}" %>
    </div>
  <% end %>
<% end %>

到目前为止,我看过Ruby文档并没有运气.一旦我理解了这段代码是如何工作的,我想扩展它以支持所有级别的flash[]消息.

我正在尝试在OS X 10.9上运行"捆绑更新",但它失败并出现以下错误消息:

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

    /Users/FrancisO/.rvm/rubies/ruby-1.9.3-p392/bin/ruby extconf.rb 
checking for ruby/util.h... *** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
    --with-opt-dir
    --with-opt-include
    --without-opt-include=${opt-dir}/include
    --with-opt-lib
    --without-opt-lib=${opt-dir}/lib
    --with-make-prog
    --without-make-prog
    --srcdir=.
    --curdir
    --ruby=/Users/FrancisO/.rvm/rubies/ruby-1.9.3-p392/bin/ruby
/Users/FrancisO/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:381:in `try_do': The compiler failed to generate an executable file. (RuntimeError)
You have to install development tools first.
    from /Users/FrancisO/.rvm/rubies/ruby-1.9.3-p392/lib/ruby/1.9.1/mkmf.rb:506:in …