Rails Messaging with Fayee , PrivatePub and Thin, MongoDB

The application we’ll be working with is a simple chat application. If we enter a message in the text field at the bottom of the page and click “Send” the browser will send an AJAX request to save the message then update the browser to add the message to the main chat window.


 incluse this in gem file

gem 'private_pub'
gem 'thin'

bundle install
-------------------------------------------
gem install faye




1) rails g model Message

class Message
  include Mongoid::Document
  include Mongoid::Timestamps
 
  field :content, type: String

end

Am using Mongo DB

2)  rails g controller messages

  def index
    @messages = Message.all
  end




def create
  @message = Message.create!(params[:message])
  PrivatePub.publish_to("/messages/new", message: @message)
end


3) create 3 files in views/messages

index.html.erb
create.js.erb
_message.html.erb


------------------index.html.erb------------------------------



<h1>Chat</h1>

<ul id="chat">
  <%= render @messages %>
</ul>

<%= form_for Message.new, remote: true do |f| %>
  <%= f.text_field :content %>
  <%= f.submit "Send" %>
<% end %>

<%= subscribe_to "/messages/new" %>

---------- create.js.erb --------------------------



<% publish_to "/messages/new" do %>
  $("#chat").append("<%= j render(@message) %>");
  $("#new_message")[0].reset();
<% end %>

-------   _message.html.erb (partial ) --- dont forget its a partial

<li>
  <span class="created_at"><%= message.created_at %></span>
  <%= message.content %>
</li>

------------------------------------------------------------------------------------

rails g private_pub:install

-----------------------------------------------------------

$ rackup private_pub.ru -s thin -E production

U will get a error dont google ..simple

go to private_pub.ru

add this line and start now

Faye::WebSocket.load_adapter('thin')

$ rackup private_pub.ru -s thin -E production

fayee starts like this

roopesh@roopesh:~/Desktop/Reachmore$ rackup private_pub.ru -s thin -E production
>> Thin web server (v1.5.0 codename Knife)
>> Maximum connections set to 1024
>> Listening on 0.0.0.0:9292, CTRL+C to stop

-------------------------------------------------------------------------

go to app/assets/javascripts.application.js

//= require private_pub

-------------------------------------------------------

got to routes

add

resources :messages 

------------------------------------------------------------------------------------
 go to assets/javascripts/messages.js.coffee

paste this code as it is

PrivatePub.subscribe "/messages/new", (data, channel) ->
  alert data.message.content

Over

localhost:3000/messages

just send a message


open other browser
localhost:3000/messages

ull get a message