NoMethodError when trying to invoke helper method from Rails controller

Question

I\'m getting a NoMethodError when trying to access a method defined in one of my helper modules from one of my controller classes. My Rails application uses the

Answer 1

If you only have ApplicationHelper inside your app/helpers folder than you have to load it in your controller with include ApplicationHelper. By default Rails only load the helper module that has the same name as your controller. (e.g. ArticlesController will load ArticlesHelper). If you have many models (e.g. Articles; Posts; Categories) than you have to upload each one in you controller. the docs

Helper

module PostsHelper
    def find_category(number)
        return 'kayak-#{number}'
    end
    def find_other_sport(number)
        "basketball" #specifying 'return' is optional in ruby
    end
end

module ApplicationHelper
    def check_this_sentence
        'hello world'
    end

end

Example Controller

class ArticlesController < ApplicationController
    include ApplicationHelper
    include PostsHelper
    #...and so on...

  def show#rails 4.1.5
    #here I'm using the helper from PostsHelper to use in a Breadcrumb for the view
    add_breadcrumb find_other_sport(@articles.type_activite), articles_path, :title => "Back to the Index"
    #add_breadcrumb is from a gem ... 
    respond_with(@articles)
  end
end