Devise：未定义的方法`user_signed_in？ for ApplicationController：Class

问题描述

我遇到了Rails 3.1.1和Ruby 1.9.2的上述错误。我花了最后一小时的时间，我发现的主要事情是：

1. clear_helpers ApplicationController中的可能会导致帮助程序无法加载。我的代码没有使用，我不相信我安装的宝石也是。




2. 缺少 devise_for 在routes.rb中。我有 devise_for：users




3. 在我的用户模型中缺少database_authenticatable。我在我的users.rb中：

   
   
   

   devise：database_authenticatable，：可注册，
   ：可恢复，可记忆，可追踪，可验证

   / li>
   

4. 我的行为与，除了 signed_in？ ：用户也不适用于我。但是， Devise.mappings 确实显示用户映射。

解决方案

作为一个社区维基，因为解决方案是微不足道的。

我正在调用调试器（我用来检查 current_user 以下代码

  class ApplicationController< ActionController :: Base 
 protect_from_forgery 
调试器
过滤器{| c | Authorization.current_user = c.current_user} 
 end 
  

Rails使会话并请求可用于控制器实例的对象。在 self == ApplicationController 的上下文中调用该调试器，当它应该是 self ==＃ MainController ...> 。

长篇小说，确保你不会在控制器中定义它，但在控制器实例中。

I'm getting the above error with Rails 3.1.1 and Ruby 1.9.2. I've spent the last hour looking and the main things I've found were:

1. clear_helpers in ApplicationController can cause the helpers to not load. My code isn't using that and I don't believe the gems I've installed are either.

2. Missing devise_for in routes.rb. I have devise_for :users

3. Missing 'database_authenticatable' in my Users model. I have in my users.rb :

   devise :database_authenticatable, :registerable, :recoverable, :rememberable, :trackable, :validatable

4. My behavior matches exactly what's described in this email thread except signed_in? :user doesn't work for me either. However, Devise.mappings does show the user mapping.

Any ideas on what could be wrong? Even a hack for current_user would help me greatly as I have to get some functionality running ASAP.

解决方案

So I'm marking this as a community wiki since the solution is trivial.

I was calling debugger (which I used to check current_user with the following code

class ApplicationController < ActionController::Base
  protect_from_forgery
  debugger
  filter {|c| Authorization.current_user = c.current_user}
end

Rails makes the session and request objects available to instances of controllers. That debugger is called in the context of self == ApplicationController when it should be self == #<MainController...>.

Long story short, make sure you're not trying to call it within a controller definition but within the controller instance.

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