A pattern for attaching ember to a sub page/controller of a rails application.

app_view.html.erb

<noscript>
<h1>This website requires that your browser support JavaScript to fully function.</h1>
<p>This website was lovingly crafted with Ember JS framework to bring you state of the art features and functionality.</p>
<h2><a href="http://www.enable-javascript.com/">Click here for instructions on how to enable JavaScript.</a></h2>
</noscript>

<div id="ember_app_container">

</div>


<%= javascript_include_tag "launch_ember" %>

application.js

// app/assets/javascripts/ember_app folder contains all the ember js project source...

//= require handlebars
//= require ember
//= require ember-data
//= require_self
//= require ./ember_app

// for more details see: http://emberjs.com/guides/application/
EmberApp = Ember.Application.create({
    rootElement: '#ember_app_container'
});

launch_ember.js

// A separate manifest for just the ember js app
// save this to app/assets/javascripts/launch_ember.js

//= require ./ember_app/application
//= require_self

Maybe add a line in application.js like this:

if(window.location.pathname == 'controllers/action'){
  EmberApp=Ember.Application.create({
      rootElement: '#ember_app_container'
  });
}

So that it won't complaint that Ember could not find #ember_app_container in other controller