我正在开发一个Rails引擎,它可以与第三方一起处理OAuth机制.我想在Struct属性中拥有所有配置,因此所有引擎配置数据都存储在一起：

require 'rails'


module ThirdParty
  class Engine < ::Rails::Engine

    initializer "third-party.some_init_task" do |app|
      ThirdPartyConfig = Struct.new(:uri,:client_id,:client_secret,:redirect_uri)

      app.config.thirdparty = ThirdPartyConfig.new
      app.config.thirdparty.uri = "https://thirdparty.com"
      app.config.thirdparty.client_id = ""
      app.config.thirdparty.client_secret = ""
      app.config.thirdparty.redirect_uri = ""
    end
  end
end

应在应用程序级初始化程序中定义一些配置：

class Application < Rails::Application

    config.thirdparty.client_id = <valid_client_id>
    config.thirdparty.client_secret = <valid_client_secret>
    config.thirdparty.redirect_uri = <redirect_uri>
end

但是,由于config.thirdparty在加载应用程序初始化程序时仍未定义,因此失败.

initializer "third-party.some_init_task",:before=> :load_config_initializers do |app|