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2013-04-05T00:39:50.480
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Seems similar to what I've seen in todomvc.com: <a href="https://github.com/addyosmani/todomvc/blob/gh-pages/architecture-examples/emberjs/js/controllers/todos_controller.js#L32" rel="nofollow">https://github.com/addyosmani/todomvc/blob/gh-pages/architecture-examples/emberjs/js/controllers/todos_controller.js#L32</a> Assuming you have an ArrayController that displays all Devices, here is what I would try: <ul> <li>create a computed property on the ArrayController for Devices that computes the total, and depends on <code>@each.measure</code>;</li> <li>(implying that Device would be displayed by a sub-view pointing to its own ObjectController) add <code>needs: ['devices']</code> to the declaration child controller, to indicate that this controller depends on the Devices controller;</li> <li>create a computed property on the Device controller that computes the share, and depends on <code>measure</code> and <code>controllers.devices.total</code>.</li> </ul> Then in the share() property function on the Device controller you can get a reference to the instance of the parent controller by using <code>this.get('controllers.devices')</code>, or you can even get the value of the total property directly with <code>this.get('controllers.devices.total')</code>. <hr> I originally started the answer with "I haven't tried it myself", but since I also wanted to see if this would work, here is a JSBin with working code: <a href="http://jsbin.com/ajoqak/12/edit" rel="nofollow">http://jsbin.com/ajoqak/12/edit</a> (edited to make it work with a REST adapter). Note that this assumes Ember.js 1.0.0-rc2 and a build of ember-data that I made some days ago (there are no official releases yet); the API has changed a bit from some answers/examples that I've seen using previous versions.
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