javascript - Angular ng-选项 : compare by id

Question

我可以将选择的 ng-model 设置为对象的键吗？在下面的示例中，默认情况下应选择“item1”。(我不想通过引用比较对象)

<div ng-controller='TestCtrl'>
    <select 
        ng-model='selectedId'
        ng-options='value for (key, value) in items'>
    </select>
</div>

var app = angular.module('myApp', []);

app.controller('TestCtrl', function($scope) {

    $scope.selectedid = 1;

    $scope.items = {
        1: 'item1',
        2: 'item2'
    }   

});

这是 jsfiddle:http://jsfiddle.net/h7yb4bys/

Answer 1

结账 http://jsfiddle.net/oj884ofm/

var app = angular.module('myApp', []);

app.controller('TestCtrl', function($scope) {

    $scope.selectedId = '1';

    $scope.items = {
        1: 'item1',
        2: 'item2'
    }   

});