Well, as stated in the sticky at the top http://discuss.emberjs.com/t/welcome-to-the-ember-js-discussion-forum/185:
Practical, answerable questions should be posted on StackOverflow and tagged with ember.js. This venue is for discussion about topics that might not have a clear answer.
This forum is more for discussion of the higher level concepts such as design and best practices, whereas your question has a pretty clear answer - SO is full of such questions and answers.
Can you please post your latest attempt at solving it on SO?