KnockOut映射层次结构JS对象 [英] KnockOut Mapping Hierarchical JS object

问题描述

我正在尝试使用KnockOut映射插件创建视图模型

I am trying to create view Models using KnockOut mapping plugin ,

这是对象，基本上下面是一个带有单词的句子.

This is the object , Basically below is a sentence with words in it.

var data = {
name: 'Example Title',
sentences: [
    {id: 1, words: [{text: 'word1'}, {text: 'word2'}]},
    {id: 2, words: [{text: 'word3'}, {text: 'word4'}]}
           ]};

我想拥有三个视图模型，

I would like to have three view Models ,

文章应包含句子，句子应包含单词

Article should contain sentences , an Sentence should contain words

var ArticleViewModel = function(data) 
{
  var self = this;
  self.id = ko.observable(data.id);
  self.sentences = ko.observableArray([]);
}

var SentenceViewModel = function(data) 
{
  var self = this;
  self.id = ko.observable(data.id);
  self.words = ko.observableArray([]);
}

var WordViewModel = function(data) 
{
  var self = this;
  self.id = ko.observable(data.id);
  self.text = ko.observable(data.text);
}

我想将其放在视图"中，如下所示:

I would like to put this in View as below ;

<p data-bind="foreach:sentences">
  <span data-bind="foreach:words">
     <span data-bind="text:text">
  </span>
</p>

我什至不确定我要实现的目标是否可行，但是我想我需要映射，但是我无法完成这项工作，

I am not even sure what I am trying to achieve is doable ,but I guess i need mappings , but I can not make this work ,

这是我的一些尝试，也许将有助于更好地了解我的问题， http://jsfiddle.net/sureyyauslu/2wTjy/6/

here is some trial of mine , maybe will help to better understand my problem , http://jsfiddle.net/sureyyauslu/2wTjy/6/

非常感谢...

推荐答案

问题是您将p标签嵌套在另一个标签中.模板引擎无法解析此错误的标记.

The problem was that you had a p tag nested within another. The template engine couldn't parse this incorrect markup.

当我认为您想要另一个foreach时，您还使用了with绑定.

You were also using a with binding when I think you wanted another foreach.

<p data-bind="foreach:sentences">
        <span data-bind="text:id"></span>
        <span data-bind="foreach:words">
            <span data-bind="text:text"></span>                   
        </span>
</p>

最后，句子模型可以简化为

Lastly the sentence model can be reduced to

var mySentenceModel = function(data) {
    var self = this;
    ko.mapping.fromJS(data, wordMapping, self);
}

您不需要定义id等，因为映射插件已将其全部处理.

You don't need to define the id etc as it's all taken care of by the mapping plugin.

http://jsfiddle.net/madcapnmckay/6hMA3/

希望这会有所帮助.

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