在哪里放置 Rails 控制器的 Ruby 辅助方法？
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Where to put Ruby helper methods for Rails controllers?
提问by at.
I have some Ruby methods certain (or all) controllers need. I tried putting them in /app/helpers/application_helper.rb. I've used that for methods to be used in views. But controllers don't see those methods. Is there another place I should put them or do I need to access those helper methods differently?
我有某些（或所有）控制器需要的 Ruby 方法。我试着把它们放进去/app/helpers/application_helper.rb。我已经将它用于要在视图中使用的方法。但是控制器看不到这些方法。是否还有其他地方我应该放置它们，或者我是否需要以不同的方式访问这些辅助方法？
Using latest stable Rails.
使用最新的稳定 Rails。
回答by Ryan Bigg
You should define the method inside ApplicationController.
你应该在里面定义方法ApplicationController。
回答by John Cleary
For Rails 4 onwards, concerns are the way to go. There is a decent article here http://richonrails.com/articles/rails-4-code-concerns-in-active-record-models
对于 Rails 4 以后，关注是要走的路。这里有一篇不错的文章 http://richonrails.com/articles/rails-4-code-concerns-in-active-record-models
In essence, if you look in your controllers folder you should see a concerns sub-folder. Create a module in there along these lines
本质上，如果您查看您的控制器文件夹，您应该会看到一个关注子文件夹。沿着这些线在那里创建一个模块
module EventsHelper
def do_something
end
end
Then, in the controller just include it
然后，在控制器中只包含它
class BadgeController < ApplicationController
include EventsHelper
...
end
回答by Muhamamd Awais
you should define methods inside application controller, if you have few methods then you can do as follow
您应该在应用程序控制器中定义方法，如果您的方法很少，那么您可以执行以下操作
class ApplicationController < ActionController::Base
helper_method :first_method
helper_method :second_method
def first_method
... #your code
end
def second_method
... #your code
end
end
You can also include helper files as follow
您还可以包含帮助文件如下
class YourController < ApplicationController
include OneHelper
include TwoHelper
end
回答by David
You can call any helper methods from a controller using the view_context, e.g.
您可以使用view_context，例如从控制器调用任何辅助方法
view_context.my_helper_method
回答by hyperrjas
Ryan Bigg response is good.
Ryan Bigg 的反应很好。
Other possible solution is add helpers to your controller:
其他可能的解决方案是向您的控制器添加助手：
class YourController < ApplicationController
include OneHelper
include TwoHelper
end
Best Regards!
此致！
回答by Aparichith
Including helpers in controller will end-up exposing helper methods as actions!
在控制器中包含 helper 最终会将 helper 方法暴露为操作！
# With new rails (>= 5)
helpers.my_helper_method
# For console
helper.my_helper_method
