Question

I have written constant.rb in lib/ folder for my rails app.To use that in ActiveRecord, I have written ActiveRecord::Base.extends Constant in constant.rb and it is working. But I don’t know how to use the same in ActionController, I tried ActionController::Base.extends Constant But It is not worked. Pls help.

Answer 1

it’s typo… you wrote the plural but actually it’s singular extend.

A few tips:

• Constant may not be a good name for your Module maybe call more specific like AppConstant.

• You shouldn’t put this into your lib/constant.rb, it’s cleaner to create a new initializer like

config/initializers/constants.rb

require 'app_constant'
ActiveRecord::Base.extend AppConstant
ActiveController::Base.extend AppConstant

maybe there’s an even better way: put the extend AppConstant into your app/controllers/application_controller.rb