如何在Play的模板中获取迭代器的索引? [英] How to get iterator's index in Play's template?

问题描述

我想在循环中使用一个计数器，因此每个表的行都有其唯一的id属性，该属性指示当前循环迭代.如何访问当前索引? (在标记为ITERATOR_HERE的示例代码中)

I want to use a counter in a loop, so each table's row has its unique id attribute which indicates the current loop iteration. How can I access the current index? (in sample code marked as ITERATOR_HERE)

<table id="table_id" class="display">
<thead>
    <th>Key</th>
    <th>Value</th>      
    <th></th>
</thead>
<tbody>
    #{list items:paras, as:'elem' }
    <tr>
        <td id="ITERATOR_HERE">${elem.sendAllKey}</td>
        <td>${elem.sendAllValue}</td>               
        <td>button</td>             
    </tr>       
    #{/list}
</tbody>    
</table>

推荐答案

list标记创建一个包含当前迭代编号的变量varname_index.有关更多信息，请参见标签参考；)

The list tag creates a variable varname_index containing the current iteration number. See the tag reference for more information ;)

因此，您的代码段变为:

So, you snippet becomes:

#{list items:paras, as:'elem' }
<tr>
    <td id="ITERATOR_${elem_index}">${elem.sendAllKey}</td>
    <td>${elem.sendAllValue}</td>               
    <td>button</td>             
</tr>       
#{/list}

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