Where to put Ruby helper methods for Rails controllers?
You should define the method inside ApplicationController.
For Rails 4 onwards, concerns are the way to go. There was a decent article which can still be viewed via the Wayback Machine.
In essence, if you look in your controllers folder you should see a concerns sub-folder. Create a module in there along these lines
module EventsHelper def do_something endendThen, in the controller just include it
class BadgeController < ApplicationController include EventsHelper ...end
you should define methods inside application controller, if you have few methods then you can do as follow
class ApplicationController < ActionController::Base helper_method :first_method helper_method :second_method def first_method ... #your code end def second_method ... #your code endendYou can also include helper files as follow
class YourController < ApplicationController include OneHelper include TwoHelperend