Trying out emberJS

gistfile1.txt

App = Ember.Application.create();

App.Store = DS.Store.extend({
  revision: 12,
  adapter: "DS.RESTAdapter"
});

controller (coffee): 
App.ApplicationController = Ember.Controller.extend(
  mainPages: App.Page.find
)

model (coffee):
App.Page = DS.Model.extend(
  title: DS.attr("string")
  content: DS.attr("string")
)


view: 
{{#each mainPages}}
<p>{{title}}</p>
{{/each}}

error:
Uncaught Error: assertion failed: Your application does not have a 'Store' property defined. Attempts to call 'find' on model classes will fail. Please provide one as with 'YourAppName.Store = DS.Store.extend()