Homepage routing based on authenticated status.

gistfile1.txt

Reference links

http://robots.thoughtbot.com/post/22605580334/constrain-yourself
https://github.com/hassox/warden/wiki/overview

routes.rb

# config/routes.rb

root to: 'projects#index', constraints: Devise::SignedInConstraint
devise_scope :user do
  root to: 'devise/sessions#new'
end

signed_in_constraint.rb

# lib/devise/signed_in_constraint.rb
module Devise
  class SignedInConstraint
    def self.matches?(request)
      request.env['warden'].authenticated?
    end
  end
end