渲染获取对象值 为空或者或获取不到？
**示例数据：**
```
var  children = [
     {"name": "An"，"age":  13,  "sex" : 0},
     {"name": "Jone"，"age":  13,  "sex" : 0}
]
```
**使用：**
```
<ul class="children" >
    {{each children as child index}}
    <li data-child="{{child}}">
        {{child.name}} - {{child.age}} - {{child.sex}} 
    </li>
    {{/each}}
</ul>
```

**问题：li[data-child] 为空**

