使用查找助手的车把故障转移内容 [英] Handlebars Failover Content With Lookup Helper
问题描述
我正在寻找通过Lookup帮助器局部渲染车把的方法.这不是问题,我可以使用以下代码做到这一点:
I am looking to render a handlebars partial via the Lookup helper. This isn't a problem, I can do that with this code:
{{> (lookup . 'type') }}
但是,如果变量type
没有呈现我的partials目录中的值,则抛出500错误.车把通过故障转移内容对此提供支持.如:
However, if the variable type
doesn't render a value that is in my partials directory, then a 500 error throws. Handlebars supports this with failover content. Such as:
{{#> myPartial }}
Failover content
{{/myPartial}}
我的问题是,我可以将查找与故障转移结合起来吗?
My question is, can I combine the lookup with the failover?
我希望做类似的事情:
{{#> (lookup . 'type') }}
Failover content
{{/(lookup . 'type')}}
推荐答案
谢谢@ 76484,但我想我找到了我想要的东西:
Thank you @76484 but I think I found what I was looking for:
{{#> (lookup . 'type') }}<!-- Return Nothing if Undefined -->{{/undefined}}
这避免了需要帮助者,并且完全满足了我的需求!
This avoids the need for a helper, and does exactly what I was looking for!
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