AngularJS databinding to complex objects through $resource

I have a restful service that returns an order. This order has a list of items. I'm making the screen where you can edit a specific item from an order. so I need to have the list of items before I can find and display the info for the specific item. I'm solving it like this:

$scope.order = orderResource.get({id:$routeParams.orderId}, function(order) {
    $scope.item = _.findWhere(order.items, {id:$routeParams.itemId});
});

And the binding looks like this:

<input id="itemName" type="text" ng-model="item.name">

My question is: is this the best way to solve this problem? (I don't want to use a route with a resolve.)