AngularJS资源承诺(AngularJS resource promise)

 我有一个简单的控制器，使用$资源： 
 
 var Regions = $resource('mocks/regions.json');

 $scope.regions = Regions.query();
 
 我在一个指令中使用这个控制器（在链接函数中） 
 
var regions = scope.regions;
 
 但地区是未定义的。 这是非常逻辑的调用是异步的。 
 
 我的问题是我如何做等待结果和区域是一个数组与所有数据？ 
 
UPDATE : 
 
 这里的定义是指令 
 
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) {}
    };
  });

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) {}
    };
  });

原文：https://stackoverflow.com/questions/19490560