Rails如何在宝石内创建初始化程序

问题描述

我正在尝试在Rails 3中构建一个gem，并且它正在尝试传递一个初始化程序：

 凭证。配置do | config | 
 file = File.read（＃{Rails.root} /config/twitter.yaml）
 file_config = YAML.load（文件）
 
 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 
  

然后我我想这样调用它：

  Credentials.time_stamp 
  

但我得到这个错误：

 未初始化的常量Twitter :: Credentials 
  

有什么问题？

谢谢

解决方案

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

  mkdir -p lib / generators / 
  

使用名称 twi将名称初始化程序复制到该文件夹​​中tter_credentials.rb

然后在该文件夹中创建另一个文件，名称如 twitter_generator.rb

  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 
  

您应该查看创建生成器的官方文档这里：


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

and then i am trying to call it like this:

Credentials.time_stamp

but i get this error:

uninitialized constant Twitter::Credentials

what is the problem?

Thanks

解决方案

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

mkdir -p lib/generators/

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

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

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

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