Instructions to setup devise

setup_devise.erb

# Add devise to Gemfile
gem 'devise'

# Run bundle
bundle install

# Run devise install
rails generate devise:install

# Make sure alert code in application.html.erb
<% flash.each do |name, msg| %>
  <%= content_tag :div, msg, :id => "flash_#{name}" %>
<% end %>

# Generate User Info Model
# Model name can be anything like,
# User Subscriber Employee etc.
rails generate devise MODEL

# Migrate Database
rake db:migrate

# Rake Routes now shows provided routes

# Following snippet of code to show user state
<% if user_signed_in? %>
  Signed in as <%= current_user.email %>. Not you?
  <%= link_to "Sign Out", destroy_user_session_path, :method => :delete %>
<% else %>
  <%= link_to "Sign Up", new_user_registration_path %> or <%= link_to "Sign In", new_user_session_path %>
<% end %>