concerns/following.rb

gistfile1.txt

#This will allow us to evaluate a block
# in the scope of a class
module Concerns
  module Following
  	extend ActiveSupport::Concerns
  	  included do
  	  	has_many :followed_user_relationships, 
          foreign_key: :follower_id, 
          class_name: 'FollowingRelationship'
        has_many :followed_users, through: :followed_user_relationships

        has_many :follower_relationships, 
          foreign_key: :followed_user_id, 
          class_name: 'FollowingRelationship'  
        has_many :followers, through: :follower_relationships

  	  end
      
      def following? user
        followed_user_ids.include? user.id
      end

      def follow user
        followed_users << user
      end

      def unfollow user
        followed_users.delete(user)
      end
    
  end
end

home_controller.rb

class HomeController < ApplicationController
  before_filter :check_logged_in_user
  def show
  	@dashboard = Dashboard.new
  end

  private

  def check_logged_in_user
    if signed_in?
      redirect_to dashboard_path
    end
  end

end

user.rb

class User < ActiveRecord::Base
  include Concerns::Following
  has_many :shouts   
end