在车把小胡子内通过键访问数组/对象变量 [英] Accessing array/object variables by key, within a handlebars mustache

问题描述

我似乎找不到解决方法，并且尝试了子表达式和StackOverflow上发布的其他各种答案-但它们似乎都假设我已经知道我正在使用的密钥.

I can't seem to find a way of doing this, and have tried subexpressions and various other answers posted on StackOverflow - but they all seem to assume that I know the key I'm using in advance.

我有以下对象:

{
    fields: {
        1: {
            complete: 1,
            submitted: 0
        },
        2: {
            complete: 1,
            submitted: 0
        }
}

等等

在我的Handlebars模板中，我正在遍历对象数组.该数组中的每个对象都有一个 field_id 键，该键是一个与上例中的1或2匹配的数字.

In my Handlebars template, I'm looping through an array of objects. Each object in that array has a field_id key which is a number that matches up to the 1 or 2 in the above example.

基于当前循环的field_id，我需要访问上述数组结构中的变量.我尝试过:

I need to access the variables in the above array structure, based on the current field_id being looped. I've tried:

{{fields [(field_id)].complete}}

{{fields [{{field_id}}].complete}}

{{fields.(field_id).complete}}

{{fields.({{field_id}}).complete}}

它们都不起作用.

有没有办法做到这一点?

Is there a way of doing this?

推荐答案

我不会为此创建一个自定义帮助程序.相反，我将使用现有的查找助手与

I would not create a custom helper for this. Instead, I would use the existing Lookup helper partnered with the with block helper:

{{#with (lookup fields field_id) as |field|}}
    {{field.complete}}
{{/with}}

或者，您可以将查找帮助器与子表达式一起使用:

Alternatively you could use the lookup helper with a subexpression:

{{lookup (lookup fields field_id) 'complete'}}

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