Untitled

<!DOCTYPE html>
<html>

  <head>
    <script src='https://ajax.googleapis.com/ajax/libs/angularjs/1.2.0-rc.3/angular.js'></script>
    <script src='http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.5.2/underscore.js'></script>
    <script type="text/javascript" src="http://cdn.jsdelivr.net/restangular/latest/restangular.js"></script>
    <script src="script.js"></script>
  </head>

  <body data-ng-app='app'>
    <div data-ng-controller='SomeController'>
      <div>
         {{someData}}
      </div>
     
    </div>
  </body>

</html>

angular.module('app', ['restangular'])

.factory('SomeService', ['$q', 'Restangular', 'Utils',
  function SomeService($q, Restangular, Utils) {
    return {
      getSomeData: function() {
        var deferred = $q.defer();
        Restangular.setBaseUrl(document.location.href);
        Restangular.one('res.json').get().then(function(res) {
          res.newlyAddedProp = 'I just added this prop';
          res = Utils.sanitizeRestangularOne(res);
          deferred.resolve(res);
        });
        return deferred.promise;
      }
    }
  }
])

.factory('Utils', [
  function Utils() {
    return {
      sanitizeRestangularOne: function(item) {
        return _.omit(item, "route", "parentResource", "getList", "get", "post", "put", "remove", "head", "trace", "options", "patch",
          "$get", "$save", "$query", "$remove", "$delete", "$put", "$post", "$head", "$trace", "$options", "$patch",
          "$then", "$resolved", "restangularCollection", "customOperation", "customGET", "customPOST",
          "customPUT", "customDELETE", "customGETLIST", "$getList", "$resolved", "restangularCollection", "one", "all", "doGET", "doPOST",
          "doPUT", "doDELETE", "doGETLIST", "addRestangularMethod", "getRestangularUrl");
      }
    }
  }
])

.controller('SomeController', ['$scope', 'SomeService',
  function SomeController($scope, SomeService) {
    $scope.someData = SomeService.getSomeData();
  }
]);

{
 "someKey": "someVal",
 "someOtherKey": "someOtherVal"
}

Demonstration how in angular 1.2rc3 automatic unproxying of promises fails (shows no result)
as it has been deprecated:

[Angular Changelog](https://github.com/angular/angular.js/blob/master/CHANGELOG.md)