Angular ng-options按问题跟踪

Question

我有一个使用ng-options显示的对象数据集.我正在将对象ID值绑定到使用的值track by

目前,正在包含数据值,但它们以逗号显示.例如...

$scope.items = [
   {ID: '2012', Title: 'Chicago'},
   {ID: '2013', Title: 'New York'},
   {ID: '2014', Title: 'Washington'},
];

<select ng-options="item.Title for item in items track by item.ID">
</select>

但这将呈现......

<option value="2,0,1,2" label="Chicago">Chicago</option>
<option value="2,0,1,3" label="New York">New York</option>

为什么要添加这些逗号,如何删除它们？

Answer 1

您不需要跟踪:

<select ng-options="i.ID as i.Title for i in items" ng-model="someModel"></select>

渲染后你将拥有:

<option value="2012">Chicago</option>
<option value="2013">New York</option>