Backbone-Rails 
Easily setup and use backbone.js (1.2.2) with Rails 3.1 and greater
##Version##
###Github master branch###
Gem version : 1.2.2
Backbone version : 1.2.2
Underscore version : 1.8.3
###Rubygems###
Gem version : 1.2.2
Backbone version : 1.2.2
Underscore version : 1.8.3
##Credits##
###Author###
Ryan Fitzgerald
###Current Maintainer
Manu S Ajith
###Contributors###
These awesome people helped to keep this gem updated
Rails setup
This gem requires the use of rails 3.1 and greater, coffeescript and the new rails asset pipeline provided by sprockets.
This gem vendors the latest version of underscore.js and backbone.js for Rails 3.1 and greater. The files will be added to the asset pipeline and available for you to use.
Installation
In your Gemfile, add this line:
gem "rails-backbone"
Then run the following commands:
bundle install
rails g backbone:install
Layout and namespacing
Running rails g backbone:install will create the following directory structure under app/assets/javascripts/backbone:
routers/
models/
templates/
views/
It will also create a toplevel app_name.coffee file to setup namespacing and setup initial requires.
Generators
backbone-rails provides 3 simple generators to help get you started using backbone.js with rails 3.1 and greater.
The generators will only create client side code (javascript).
Model Generator
rails g backbone:model model_name [property_name:property_type[,]]
This generator creates a backbone model and collection inside app/assets/javascript/backbone/models to be used to talk to the rails backend.
Routers
rails g backbone:router model_name [action_name[,]]
This generator creates a backbone router with corresponding views and templates for the given actions provided.
Scaffolding
rails g backbone:scaffold model_name [property_name:property_type[,]]
This generator creates a router, views, templates, model and collection to create a simple crud single page app
Example Usage
Created a new rails application called blog.
rails new blog
Edit your Gemfile and add
gem 'rails-backbone'
Install the gem and generate scaffolding.
bundle install
rails g backbone:install
rails g scaffold Post title:string content:string
rake db:migrate
rails g backbone:scaffold Post title:string content:string
You now have installed the backbone-rails gem, setup a default directory structure for your frontend backbone code.
Then you generated the usual rails server side crud scaffolding and finally generated backbone.js code to provide a simple single page crud app.
You have one last step:
Edit your posts index view app/views/posts/index.html.erb with the following contents:
<div id="posts"></div>
<script type="text/javascript">
$(function() {
// Blog is the app name
window.router = new Blog.Routers.PostsRouter({posts: <%= @posts.to_json.html_safe -%>});
Backbone.history.start();
});
</script>
If you prefer haml, this is equivalent to inserting the following code into app/views/posts/index.html.haml:
#posts
:javascript
$(function() {
// Blog is the app name
window.router = new Blog.Routers.PostsRouter({posts: #{@posts.to_json.html_safe}});
Backbone.history.start();
});
Now start your server rails s and browse to localhost:3000/posts
You should now have a fully functioning single page crud app for Post models.
Sample application can be found here
##Note:##
####Overrides backbone sync function####
This gem overrides the backbone sync function. Check here for details.
####With Rails 4:####
If you are using the default Rails 4 scaffold generators, you will need to adjust the default JSON show view (IE, 'show.json') to render the 'id' attribute.
default rails generated show.json.jbuilder
json.extract! @post, :title, :content, :created_at, :updated_at
Change it to add id attribute as well
json.extract! @post, :id, :title, :content, :created_at, :updated_at
Without adjusting the JSON show view, you will be redirected to a "undefined" url after creating an object.