Ruby on rails Heroku NameError（未初始化的常量ApplicationController:：ADMIN\u ID）

我正在制作一个简单的博客来学习rails

一切都快完成了，我正在尝试应用HTTP身份验证，如下所述-->

在ApplicationController中，我的身份验证代码如下所示

class ApplicationController < ActionController::Base
  protect_from_forgery

  protected
    def authenticate
      authenticate_or_request_with_http_basic do |username, password|
        username == ADMIN_ID && password == ADMIN_PASSWORD
      end
    end
end

当我尝试登录时，虽然我收到了一条“出错”的消息。以下是heroku日志的内容：

GET fast-chamber-1998.herokuapp.com/admin dyno=web.1 queue=0 wait=0ms service=10ms status=500 bytes=643
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: Started GET "/admin" for 60.245.65.132 at 2012-11-11 07:18:47 +0000
2012-11-11T07:18:47+00:00 app[web.1]: Processing by PostsController#admin as HTML
2012-11-11T07:18:47+00:00 app[web.1]: Completed 500 Internal Server Error in 1ms
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: NameError (uninitialized constant ApplicationController::ADMIN_ID):
2012-11-11T07:18:47+00:00 app[web.1]:   app/controllers/application_controller.rb:7:in `block in authenticate'
2012-11-11T07:18:47+00:00 app[web.1]:   app/controllers/application_controller.rb:6:in `authenticate'
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: 

---

从外观上看，我认为我传递的环境变量似乎没有被检测到。你建议我做什么

您应该通过

ENV['ADMIN\u ID']

和

ENV['ADMIN\u PASSWORD']

GET fast-chamber-1998.herokuapp.com/admin dyno=web.1 queue=0 wait=0ms service=10ms status=500 bytes=643
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: Started GET "/admin" for 60.245.65.132 at 2012-11-11 07:18:47 +0000
2012-11-11T07:18:47+00:00 app[web.1]: Processing by PostsController#admin as HTML
2012-11-11T07:18:47+00:00 app[web.1]: Completed 500 Internal Server Error in 1ms
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: NameError (uninitialized constant ApplicationController::ADMIN_ID):
2012-11-11T07:18:47+00:00 app[web.1]:   app/controllers/application_controller.rb:7:in `block in authenticate'
2012-11-11T07:18:47+00:00 app[web.1]:   app/controllers/application_controller.rb:6:in `authenticate'
2012-11-11T07:18:47+00:00 app[web.1]: 
2012-11-11T07:18:47+00:00 app[web.1]: