AngularJS resource promise

Question

I've got a simple controller that use $resource :

 var Regions = $resource('mocks/regions.json');

 $scope.regions = Regions.query();

I'm using this controller in a directive (in the link function)

var regions = scope.regions;

But regions is undefined. It's pretty logic the call is asynchronous.

My question is how can i do to wait the result and regions be an array with all data ?

UPDATE : 

Here the definition of the directive

app.directive('ngMap', function() {
  return {
    restrict: 'EA',
    replace: 'true',
    scope: {

    },
    template: '<div id="map"></div>',
    controller: 'AccordMapCtrl',
    link: function(scope, element, attrs) {
      var regions = scope.regions;
      console.log(regions);

      for (var region in regions) {}
    };
  });

Answer 1

If you want to use asynchronous method you need to use callback function by $promise, here is example:

var Regions = $resource('mocks/regions.json');

$scope.regions = Regions.query();
$scope.regions.$promise.then(function (result) {
    $scope.regions = result;
});