Question

我有一个这样的例子，用于在viewmodel（observable）类构造函数中定义的本地值，但是当你有一个远程数据源时它似乎不起作用。

我怎么能得到一个类似于下面为远程数据源工作的例子，它甚至可能吗？

<div id='root'>
    <label>Remote Name: </label> 
    <span data-bind="text: firstName"><!--firstName--></span>, 
    <span data-bind="text: lastName"><!--lastName--></span>

    <div>
        <label>Remote Name: 
            <input data-bind="value: firstName" />,
            <input data-bind="value: lastName" />
        </label> 
    </div>
</div>
<br/>
<br/>
<div id='local-root'>
    <label>Local Name: </label>
    <span data-bind="text: firstName"></span>, 
    <span data-bind="text: lastName"></span>

    <div>
        <label>Local Name: 
            <input data-bind="value: firstName" />,
            <input data-bind="value: lastName" />
        </label> 
    </div>
</div>
<br/>
<br/>
<div id='test-ajax'>
    <pre>
    </pre>
</div>

$(document).ready(function(){
    /**
    * #local-root example, binds to local data like in the examples
    */
    var personLocalViewModel = kendo.observable({
        firstName: 'James',
        lastName: 'Taylor'
    });

    kendo.bind($('#local-root'), personLocalViewModel);

    /** 
    * set's up a mock api endpoint for jquery and other libraries
    */
    $.mockjax({
        url: "js/data/person.json",
        contentType: "application/json",
        responseText: {
            firstName: 'James',
            lastName: 'Taylor'
        }
    });

    /**
    * test-ajax - proves mockajax works
    */
    $.ajax({
        url: "js/data/person.json",
        dataType:'json',
        success:function(response){
            $('#test-ajax pre').text(JSON.stringify(response));
        }
    });


    /**
    * #root or remote-root, this dataSource is not bidning to the html, why?
    */
    console.log('KENDO.js', kendo.data);
    var personSource = new kendo.data.DataSource({
        transport: {
            read: {
                url: "js/data/person.json",
                dataType: "json"
            }
        },
        schema:{
            parse: function(response){
                console.log('personSource.schema.parse',response);
                return response;
            },
            data: function(response){
                console.log('personSource.schema.data',response);
                return response;
            }
        }
    });

    //would this work?
    var personViewModel = kendo.observable({
        dataSource: personSource
    });

    //would this work?
    var personViewModel2 = kendo.observable(personSource);

    kendo.bind($('#root'), personViewModel);


});

Answer 1

DataSource希望对一组记录进行操作。我相信你可以用解析或模式解决这个问题，但是对于这个例子，我改变了模拟ajax调用以返回一个数组。

$.mockjax({
    url: "js/data/person.json",
    contentType: "application/json",
    responseText: [{
        firstName: 'James',
        lastName: 'Taylor'
    }]
});

第一个问题是您设置数据源但从不填充数据。我添加了对.read()

的调用

personSource.read();

当我将responseText更改为数组时，我更新了与此类似的绑定：

data-bind="text: dataSource.view()[0].firstName"

最后，here's an updated fiddle

Kendo，如何将MVVM文本：字段绑定到远程DataSource？

1 个答案: