javascript - 如何使用Knockout连接可观察数组中的所有项目？

我有以下对象：

var Transaction = function (data) {
    this.ID = ko.observable(data.transaction.ID);
    this.number = ko.observable(data.transaction.number);
    this.userID = ko.observable(data.transaction.userID);
    this.password = ko.observable(data.transaction.password);

    this.Properties = ko.observableArray(data.Property);
}

属性可观察数组如下所示（在JSON中）：

[{"address1":"111 Broadway","city":"Brooklyn","state":"NY","zip":null},
{"address1":"222 Broadway","city":"Brooklyn","state":"NY","zip":null}]

在我的HTML中，我有类似以下内容：

<span>PROPERTY</span>
<span data-bind="foreach: Properties">
<span data-bind="text: address1"></span>
<span data-bind="text: city"></span>
span data-bind="text: state"></span>
<span data-bind="text: zip"></span>
</span>

在浏览器中看起来像：

PROPERTY
111 Broadway
Brooklyn
NY
222 Broadway
Brooklyn
NY

我希望它看起来像：

111 Broadway, Brooklyn, NY
222 Broadway, Brooklyn, NY

有什么建议吗？

最佳答案

您可以在Transaction原型中作为Properties列表视图创建一个计算属性，这将简化与之关联的HTML标记。

this.propertyView = ko.pureComputed(function() {
  return this.Properties().map(function(prop) {
    var singleProp = '';
    for (var p in prop)
      if (prop[p])
        singleProp += prop[p] + ', ';
    return singleProp.slice(0,-2);
  });
}, this);

<span>PROPERTIES</span>
<!-- ko foreach: propertyView -->
<p data-bind="text: $data"></p>
<!-- /ko -->