在“ApplicationController”类之后，初始化程序更改“alias_method”undefined方法“current_user” [英] After initializer change 'alias_method' undefined method 'current_user' for class 'ApplicationController'

问题描述

我有以下初始化器：

app / config / initializers / store_location.rb

 模块StoreLocation 
 
 def self.skip_store_location 
 [
 Devise :: SessionsController，
设计： ：RegistrationsController，
 Devise :: PasswordsController 
] .each do | controller | 
 controller.skip_before_filter：store_location 
 end 
 end 
 
 self.skip_store_location 
 end 
  

我的ApplicationController的相关部分：

  class ApplicationController< ActionController :: Base 
 protect_from_forgery 
 before_filter：convert_legacy_cookies 
 before_filter：store_location 
 
 alias_method：devise_current_user，：current_user 
 
 def current_user 
＃做某事
 end 
 
 private 
 def store_location 
＃store location 
 end 
  

加
config / environments / development.rb

  Foo :: Application.configure do 
＃normal rails stuff 
 config.to_prepare do 
 StoreLocation.skip_store_location 
 end 
 end 
  

如果我让RSpec / Rails运行self.skip_store_location，我得到以下错误： p>

  /foo/app/controllers/application_controller.rb:7:in`alias_method'：对于ApplicationController类的未定义方法`current_user' （NameError）
  

如果我删除该通话，一切都回到正常（除了过滤器运行，如预期）。我猜，我搞砸了依赖加载吗？

解决方案

问题是你使用 alias_method在 ApplicationController 中定义方法之前。要解决问题，请移动

  alias_method：devise_current_user，：current_user 
  / pre> 
 
 
以下
  def current_user 
＃ 
 end 
  
运行 skip_store_location 。我认为这是因为 skip_store_location 加载了几个控制器，其中一个是 ApplicationController 的子类。
 
I've got the following initializer:

app/config/initializers/store_location.rb
module StoreLocation

  def self.skip_store_location
    [
        Devise::SessionsController,
        Devise::RegistrationsController,
        Devise::PasswordsController
    ].each do |controller|
      controller.skip_before_filter :store_location
    end
  end

  self.skip_store_location
end
Relevant parts of my ApplicationController:
class ApplicationController < ActionController::Base
  protect_from_forgery
  before_filter :convert_legacy_cookies
  before_filter :store_location

  alias_method :devise_current_user, :current_user

  def current_user
    # do something
  end

  private
  def store_location
    # store location
  end
Plus this in
config/environments/development.rb 
Foo::Application.configure do
# normal rails stuff
config.to_prepare do
    StoreLocation.skip_store_location
  end
end
If I let RSpec/Rails run the self.skip_store_location I'm getting the following error:
/foo/app/controllers/application_controller.rb:7:in `alias_method': undefined method `current_user' for class `ApplicationController' (NameError)
If I remove the call, everything is back to normal (except the filter is run, as expected). I'm guessing that I mess up dependency loading somehow?
解决方案
The problem is that you use alias_method before the method is defined in ApplicationController. To fix the problem, move the line
alias_method :devise_current_user, :current_user
below
def current_user
  # do something
end
It's a bit misleading that the error appears when running skip_store_location. I assume that happens because skip_store_location loads several controllers, and one of them is a subclass of ApplicationController.

                        
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