如何在每个流星中获取索引 [英] How to get the index in meteor in each

问题描述

如何获取meteor中的每个循环索引.@index不起作用.请帮帮我.

How to get the each loop index in meteor.@index is not working.Please help me.

Template.apichange.helpers({
    api_rest_data: function () 
    {     
        return Session.get("api_rest_list");
    }
   });




 {{#each api_rest_data}}
                    <tr>
                        <td><select id="methodname"> <option id="optn" value="{{ method_name }}"> {{ @index }}  </option></select></td>

                    </tr>
   {{/each}} 

推荐答案

它需要另一个助手，查看 我在我的 Meteor 书中使用的解决方案:

It requires another helper, check out my solution that I have used in my book on Meteor:

Template.registerHelper('withIndex', function (list) {
    var withIndex = _.map(list, function (v, i) {
        v.index = i;
        return v;
    });
    return withIndex;
});

这会注册一个名为 withIndex 的全局助手.每当您在 each 上下文中使用的数组上调用它时，它将允许您以与使用 相同的方式使用 {{index}}{{@index}} 告诉每个元素在数组中的哪个位置.

This registers a global helper named withIndex. Whenever you call it on an array that is used inside the each context it will allow you to use {{index}} in the same way you would have used {{@index}} to tell which position in the array each element has.

调整您的包含标签以首先将 api_rest_data 传递给 withIndex:

Adjust your inclusion tag to pass api_rest_data to withIndex first:

{{#each withIndex api_rest_data}}

这篇关于如何在每个流星中获取索引的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！