AngularJS:如何传入id字符串中有多个作用域参数的元素id？

<div ng-controller="MyController">
  <input type="text" ng-model="id1" ng-attr-id="{{ 'element-' + id1 }}">
  <input type="text" ng-model="id2" ng-attr-id="{{ 'element-' + id2 }}">
</div>

angular.module('myApp', [])
  .controller('MyController', function($scope) {
    $scope.id1 = '1';
    $scope.id2 = '2';
    
    // 在需要的时候更新id1和id2的值
    $scope.updateIds = function() {
      $scope.id1 = '3';
      $scope.id2 = '4';
    };
  });

<div ng-controller="MyController">
  <input type="text" ng-model="id1" ng-attr-id="{{ 'element-' + id1 }}">
  <input type="text" ng-model="id2" ng-attr-id="{{ 'element-' + id2 }}">
  
  <button ng-click="updateIds()">更新id值</button>
</div>