Angular js无法访问指令中的更新范围？

Question

我创建了两个指令并应用于元素。当我在selectControlDir中警告ng-model时，它在alert中获取值，而在cbqControlDir中，我在alert中得到未定义。

我在加载和更改cbqControlDir时进行了一些ajax调用，我在url中传递了这些值，但在页面加载时在url中未定义。
的的index.html

<div class="row">
                    <div class="form-group">
                        <label class="col-sm-5 control-label" for="VehicleOriginalCost">{{questions[$state.current.name].VehicleOriginalCost.QuestionData._text}}</label>
                        <div class="col-sm-6">
                            <input type="text" id="VehicleOriginalCost" class="form-control" name="VehicleOriginalCost" ng-model="answers.VehicleOriginalCost" data-que-obj="questions[$state.current.name].VehicleOriginalCost.QuestionData" required text-control-dir cbq-dir number-only>
                        </div>                    
                    </div>
                    <span class="form-error" ng-show="submitted && DTOstep1.VehicleOriginalCost.$error.required">This field is required.</span>
                </div>

controlDirective.js

function textControlDir()
{
    return {
        transclude: true,
        restrict: 'A',
        priority: 100,
        scope: {
          ngModel: '=',
          queObj: '='
        },
       link: function (scope, element, attrs) {
            if (angular.isUndefined(scope.ngModel))
            {
                scope.ngModel = scope.queObj._pageAttributes.defaultValue;
            }               
        }
    };
}

function cbqControlDir($http)
    {
        return {
            transclude: true,
            restrict: 'A',
            priority: 200,
            require: ngModel,
           link: function (scope, element, attrs) {

        //http call 
       //url apc.php/ngModel          
            }
        };
    }

如何访问指令中的更新范围值？
Plunker for code