New App

# new rails app
rails _5.0.0.beta3_ new ac && cd ac
# initialize Git
git init && git add .
# first commit
git commit -am "initial commit"

Generate the Rooms Controller and Message Model

rails g controller rooms show
rails g model message content:text
rails db:migrate
# commit
git add .
git commit -am "Rooms Crontroller and Message Model"

Add a test message:

Message.create content: 'hello world'

Update the routes to send root to rooms#show

routes.rb:

root to: 'rooms#show'

Start the server and open the browser and show that the app is up

rails server

http://localhost:3000

Set up the controller method and message views

rooms_controller.rb:

def show
  @messages = Message.all
end

show.html.erb

_message.html.erb

git add .
git commit -am "Add rooms/message views"

Pop open the browser again

http://localhost:3000

Generate our ActionCable room channel with 'speak' action:

rails g channel room speak

Uncomment App in cable.coffee and ActionCable mount in routes.rb

Implement received and speak in room.coffee

Implement speak in room_channel.rb

def speak(data)
   ActionCable.server.broadcast 'room_channel', data['message']
 end

git add .
git commit -am "ActionCable Enabled"

Restart Rails Server and Demo via JS console

Add form field and required JavaScript to send messages..

Remove

from room.coffee received method

Update channel 'speak' implementation to actually write to the db.

Generate Job to handle Broadcasts

rails g job BroadcastMessage

Add after_create_commit hook to send broadcast job.

after_create_commit { BroadcastMessageJob.perform_later self }

git add .
git commit -am "Fin"

Restart rails server and demo working ActionCable in browser.

Set up devise

Add to the Gemfile:

gem 'devise', github: 'plataformatec/devise'

Install Devise and Generate User Model

bundle install
rails g devise:install
rails g devise User
rails g migration AddUserToMessages user:references:index
rails db:migrate
git add .
git commit -am "Devise and User Model"

Add belongs_to to Message Model:

message.rb:

belongs_to :user

Update add devise before_action to controller:

rooms_controller.rb:

before_action :authenticate_user!

Update v2 files

application.html.erb _message.html.erb room.coffee rooms.coffee show.html.erb

Explain current_user, warden config. Add warden hooks:

Populate: config/initializers/warden_hooks.rb connection.rb

Demonstrate in the browser. RESTART SERVER

v3 STYLE