The code you posted should work so the problem is probably situated somewhere else.
One of the reasons could be that a JavaScript error is thrown somewhere else or that no items are found in the scope. Make sure to check the browser console.
Here is a working version of your code for your convenience:
http://plnkr.co/edit/pCTInrtITqHraC1hPyZH?p=preview
Hope that helps!