Rails 如何在 gem 中创建初始化程序 [英] Rails how to create an initializer inside a gem

问题描述

我正在尝试在 Rails 3 中构建一个 gem，并在其中尝试传递一个初始化程序:

I am trying to build a gem in Rails 3 and inside it i am trying to pass an initializer:

Credentials.configure do |config|
  file = File.read("#{Rails.root}/config/twitter.yaml")
  file_config = YAML.load(file)

  config.consumer_key = file_config[Rails.env][:consumer_key]
  config.consumer_secret = file_config[Rails.env][:consumer_secret]
  config.callback_url = URI.escape(file_config[Rails.env][:callback_url])
  config.time_stamp = Time.now.to_i
end

然后我尝试这样称呼它:

and then i am trying to call it like this:

Credentials.time_stamp

但我收到此错误:

uninitialized constant Twitter::Credentials

有什么问题?

谢谢

推荐答案

你的 gem 首先需要在 lib/generators/your_gem_name_generator.rb 中定义一个生成器

Your gem will first need to define a generator in lib/generators/your_gem_name_generator.rb

mkdir -p lib/generators/

将您的初始化程序复制到该文件夹​​中，名称类似于 twitter_credentials.rb

Copy your initializer in that folder with a name like twitter_credentials.rb

然后在该文件夹中创建另一个文件，其名称类似于 twitter_generator.rb，内容如下:

Then create another file in that folder with a name like twitter_generator.rb with content like this:

class YourGemNameRailtie < Rails::Generators::Base
  source_root(File.expand_path(File.dirname(__FILE__)))
  def copy_initializer
    copy_file 'twitter_credentials.rb', 'config/initializers/twitter_credentials.rb'
  end
end

您应该在此处查看有关创建生成器的官方文档:http://guides.rubyonrails.org/generators.html

You should check out the official documentation for creating a generator here: http://guides.rubyonrails.org/generators.html

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