angularjs – 在ng-repeat内找不到md-sidenav句柄的实例

使用：

app.controller('MenuCtrl',['$scope','$mdSidenav',function($scope,$mdSidenav) {
  var stack = [];

  $scope.getStack = function() {
    return stack;
  }

  $scope.add = function(id) {
    stack.push(id);
  }

  $scope.toggle = function(id) {
    $mdSidenav(id).toggle();
  }
}]);

有：

<md-button ng-click="add('test')" class="menuBtn">Add</md-button>
<md-button ng-click="toggle('test')" class="menuBtn">Toggle</md-button>
<md-sidenav class="md-sidenav-left md-whiteframe-z2" md-component-id="{{id}}" ng-repeat="id in getStack()">
  {{id}}
</md-sidenav>

单击“添加”按钮可按预期在doc中生成md-sidenav元素.但是,Toggle按钮除了在控制台中产生“找不到句柄测试的实例”错误之外什么都不做.使用md-component-id =“test”声明静态md-sidenav工作正常.我正在使用AngularJS 1.3.15和Angular Material 0.8.3.