敲除绑定 select 与具有可观察属性的自定义对象

Knockout bind select with custom object with observable properties

我正在尝试将 <select> 与 Knockout 绑定。在我的 ViewModel 中,我有 2 个不同的对象,每个对象都具有可观察的属性。

第一个对象是 Property,它有一个 headquarter_id 作为一个 ko.observable()。 第二个对象是 Headquarter,它有一个 id 和一个 name,两者都是 ko.observable().

我想做的是将 select 与 ko.observableArray()Headquarter 对象绑定,如下所示:

<select id="headquarters" data-bind="options: HeadquarterOptions, optionsText: name, optionsValue: id, optionsCaption: '--Select--', value: Property().headquarter_id"></select>

但我不断收到:

Uncaught ReferenceError: Unable to process binding "options: function (){return HeadquarterOptions }"
Message: id is not defined

这是我的 ViewModel 的样子:

var Property = function () {
    var self = this;
    self.headquarter_id = ko.observable();
}

var Headquarter = function (id, name) {
    var self = this;
    self.id = ko.observable(id);
    self.name = ko.observable(name);
}

var headquarterOptions = [
        new Headquarter(1, "hq 1"),
        new Headquarter(2, "hq 2"),
        new Headquarter(3, "hq 3"),
    ]

var PropertiesViewModel = function (app, dataModel) {
    var self = this;
    self.Property = ko.observable(new Property());
    self.HeadquarterOptions = ko.observableArray(headquarterOptions);
}
    
ko.applyBindings(PropertiesViewModel);

我怎样才能做到这一点?
这是我当前的 fiddle:http://jsfiddle.net/juandozco/dzwnb05b/

optionsValueoptionsText 应声明为函数而不是值 (http://knockoutjs.com/documentation/options-binding.html):

optionsText: function(item) {return item.name; }
optionsValue: function(item){ return item.id; }

查看更新后的 fiddle:http://jsfiddle.net/dzwnb05b/3/

好了http://jsfiddle.net/dzwnb05b/4/

<select class="form-control" id="headquarter" data-bind="options: HeadquarterOptions, optionsText: 'name', optionsValue: 'id', optionsCaption: '--Select--', value: Property().headquarter_id"></select>

您在名称和 ID 两边缺少单引号。