feed.rb

class Feed < ActiveRecord::Base
  attr_accessible :description, :item, :lastBuildDate, :link, :pubDate, :title
  include FeedFetcher
end

feedfetcher.rb

require 'feedzirra'
require 'celluloid'
 
class Feed
  module FeedFetcher
    extend ActiveSupport::Concern
  
    include Celluloid
 
    module ClassMethods
      def fetchfeed(url)
        feed = Feedzirra::Feed.fetch_and_parse(url)
        p feed.title      
      end
    end
  end
end

terminal

[3] pry(main)> x = Feed.new
NameError: uninitialized constant Feed::FeedFetcher
from /Users/kingdom/codevault/katanawind/app/models/feed.rb:3:in `Feed'
[4] pry(main)>