Question

我正在尝试使用'track by'表达式按值跟踪我的选择，但是，我无法让它工作。

JS

   var app = angular.module('cwsystem', []).controller('RegistrationCtrl', ['$scope', function($scope){
        $scope.roles = [
            {value: '110', position: 'Security Chief'},
            {value: '111', position: 'Security Officer'}
        ];
   }]);

HTML

 <select name="userStatus" ng-model="user.userStatus" ng-options=" role.value as role.position for role in roles track by role.position" class="form-control input-sm" required>
    <option value="">--Select Status--</option>
 </select>

我希望浏览器呈现如下结果：

 <select name="userStatus" ng-model="user.userStatus" ng-options=" role.value as role.position for role in roles track by role.position" class="form-control input-sm" required>
    <option value="">--Select Status--</option>
    <option value="110">Security Chief</option>
    <option value="111">Security Officer</option>
 </select>

请问这个问题可以得到一些帮助吗？

Answer 1

ng-options不接受＆＃34; role.value为role.position，角色角色跟踪角色。位置＆＃34;表达

<select name="userStatus" ng-model="user.userStatus" ng-options=" role.value as role.position for role in roles" class="form-control input-sm" required>
    <option value="">--Select Status--</option>
</select>

如果在ng-option中使用上面的表达式，您将在ng-model变量中获得选定的值

使用角度1.3.0的轨道的ng-options

1 个答案: