无法使用 Handlebars JS 和 Ember JS 循环遍历嵌套的 JSON 数组(大写属性) [英] Unable to loop through nested JSON array ( uppercase properties ) with Handlebars JS with Ember JS

问题描述

我正在学习 Ember JS 和 Handlebars JS，所以我对此很陌生.

我在尝试遍历嵌套的 JSON 数组时遇到问题.我无法遍历下面 JSON 中的页面".

这是 JSON:

<代码>{页面":[{身份证":1，"名称": "第 1 页",对象":[{宽度":100，高度":200，类型":形状"},{宽度":150，身高":250，类型":图像"}]},{身份证":2，"名称": "第 2 页",对象":[]}],设置":{"URL": "http://THEURL",位置":真实，导航":true},身份证":1，"Title": "标题",说明":说明"}

这是我的车把模板:

另外，当我添加:

{{Pages}}

在把手模板中，浏览器中的输出为:

[object Object],[object Object]

我不确定这是否是问题所在.

解决方案

大写变量被认为是全局范围，你需要完全限定它们或将它们变成小写

http://emberjs.jsbin.com/UhIGevUf/1/edit

<div class="row"><h1>{{model.Title}}</h1><!-- 这有效--><h2>{{model.Description}}</h2><!-- 这有效--><!-- 这不起作用:--><ul>{{#model.Pages 中的每个页面}}<li>页面 ID:{{page.Id}} <br/>页面名称:{{page.Name}} 
<ul>{{#page.Objects 中的每个 obj}}<li>{{obj.Type}}</li>{{/每个}}{{/每个}}

I am learning Ember JS and Handlebars JS so I am very new to this.

I am having an issue trying to loop through nested JSON array's. I am unable to loop through the 'Pages" in the JSON below.

Here is the JSON:

{
    "Pages": [
      {
        "Id": 1,
        "Name": "Page 1",
        "Objects": [
          {
            "Width": 100,
            "Height": 200,
            "Type": "Shape"
          },
          {
            "Width": 150,
            "Height": 250,
            "Type": "Image"     
          }
        ]
      },
      {
        "Id": 2,
        "Name": "Page 2",
        "Objects": [

        ]
      }
    ],
    "Settings": {
        "URL": "http://THEURL",
        "Location": true,
        "Navigation": true
     },
     "Id": 1,
     "Title": "The Title",
     "Description": "The Description"
}

This is my handlebars template:

<script type="text/x-handlebars" id="pages">
<div class="container">
    <div class="row">
        <h1>{{Title}}</h1> <!-- This works -->
        <h2>{{Description}}</h2> <!-- This works -->

        <!-- This doesn't work: -->
        <ul>
        {{#each Pages}}
              <li>Page ID: {{Id}} <br /> Page Name: {{Name}} <br />
                  <ul>
                  {{#each Objects}}
                    <li>{{Type}}</li>
                  {{/each}}
                  </ul>
              </li>
        {{/each}}
        </ul>

    </div>
</div>
</script>

Also, when I just add:

{{Pages}}

in the handlebars template, the output in the browser is:

[object Object],[object Object]

I am not sure if that is the issue or not.

解决方案

Uppercase variables are considered global scope, you need to fully qualify them or make them lowercase

http://emberjs.jsbin.com/UhIGevUf/1/edit

<div class="container">
    <div class="row">
        <h1>{{model.Title}}</h1> <!-- This works -->
        <h2>{{model.Description}}</h2> <!-- This works -->

        <!-- This doesn't work: -->
        <ul>
        {{#each page in model.Pages}}
              <li>Page ID: {{page.Id}} <br /> Page Name: {{page.Name}} <br />
                  <ul>
                  {{#each obj in page.Objects}}
                    <li>{{obj.Type}}</li>
                  {{/each}}
                  </ul>
              </li>
        {{/each}}
        </ul>

    </div>
</div>

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