Knockout 映射插件未在模型内映射数组
我试图将一些数据（从 jQuery $.ajax 调用返回）映射到视图模型，但由于某种原因，嵌套数组未映射。
<p>Name: <input data-bind="value: Name" /></p>
<p>Age: <input data-bind="value: Age" /></p>
<p>Friends: <span data-bind="text: Friends.length"></span></p>
<script type="text/javascript">
var viewModel = null;
var data = { "Name": "Simon", "Age": "24", "Friends": [{ "Name": "Bill", "Age": "24" }, { "Name": "Peter", "Age": "21"}]};
viewModel = ko.mapping.fromJS(data);
ko.applyBindings(viewModel);
</script>
在这个简单的例子中，西蒙没有朋友......
I'm trying to map some data (returned from a jQuery $.ajax call) to a view model, but for some reason the nested array is not mapped.
<p>Name: <input data-bind="value: Name" /></p>
<p>Age: <input data-bind="value: Age" /></p>
<p>Friends: <span data-bind="text: Friends.length"></span></p>
<script type="text/javascript">
var viewModel = null;
var data = { "Name": "Simon", "Age": "24", "Friends": [{ "Name": "Bill", "Age": "24" }, { "Name": "Peter", "Age": "21"}]};
viewModel = ko.mapping.fromJS(data);
ko.applyBindings(viewModel);
</script>
In this simple example Simon has no friends...
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mapping.fromJS 将数组转换为可观察数组，因此 Friends 是一个可观察数组，要访问其底层 javascript 数组，您需要调用它：Friends().length
mapping.fromJS converts arrays to observable arrays, so Friends is an observable array and to access its underlying javascript array you need to call it: Friends().length