Handlebars Scope问题:无法从嵌入式`each`访问模板变量

Question

我试图弄清楚为什么我无法从each我的手柄模板中的嵌入语句中访问我的模板变量(在我的keystone项目中呈现).我在StackOverflow上已经阅读了许多类似问题的问题,但没有一个解决了我的特定用例.

我有一个简单的数据对象,传递给Handlebars模板,看起来像[粗略]这样:

{ 
   rootPath: '../../../', 
   navigation: { all: { 'a': { sublinks: [Object] }
}

我的问题是:

为什么rootPath模板变量完美打印{{#each navigation.all}},但内部无法访问{{#each sublinks}}？

这是我的Handlebars模板:

<!-- rootPath prints fine here -->
Here is your rootPath variable: {{rootPath}}

{{#each navigation.all}}

    <!-- rootPath prints fine here -->
    top-level rootPath: {{../rootPath}}

    {{#if sublinks}}

            {{#each sublinks}}

                <!-- WHY WON'T ROOTPATH PRINT HERE?? -->
                <!-- Obviously, I am trying the three possible scope paths -->
                sub-level rootPath attempt 1: {{../../rootPath}}
                sub-level rootPath attempt 2: {{../rootPath}}
                sub-level rootPath attempt 3: {{rootPath}}

            {{/each}}

    {{/if}}

{{/each}}

我得到以下输出(注意所有子级别尝试无法访问rootPath模板变量):

Here is your rootPath variable: ../../../
top-level rootPath: ../../../
sub-level rootPath attempt 1:
sub-level rootPath attempt 2:
sub-level rootPath attempt 3:

我需要的是rootPath随处可用,所以我可以得到这样的东西:

Here is your rootPath variable: ../../../
top-level rootPath: ../../../
sub-level rootPath: ../../../

那么我在这里缺少什么范围问题或语法？

我正在使用Handlebars版本2.0.0,因为这是由keystone预先打包的.

Answer 1

我能够通过使用@root令牌解决问题.

只需@root.rootPath从嵌入式内部调用{{#each sublinks}}即可解决我的问题.

这是正确的模板标记:

Here is your rootPath variable: {{rootPath}}

{{#each navigation.all}}

    top-level rootPath 1: {{../rootPath}}      <!-- works -->
    top-level rootPath 2: {{@root.rootPath}}   <!-- works -->

    {{#if sublinks}}

            {{#each sublinks}}
                sub-level rootPath 1: {{@root.rootPath}}  <!-- works -->
                sub-level rootPath 2: {{../../rootPath}}  <!-- doesn't work -->
            {{/each}}

    {{/if}}

{{/each}} 

产生以下输出:

Here is your rootPath variable: ../../../
top-level rootPath 1: ../../../
top-level rootPath 2: ../../../
sub-level rootPath 1: ../../../
sub-level rootPath 2: 

注意:对于顶级rootPath(在{{#each navigation.all}},我可以使用以下任何一个:

{{../rootPath}}      <!-- works -->
{{@root.rootPath}}   <!-- works -->

但是,从内嵌{{#each sublinks}},只有@root.rootPath似乎工作:

{{@root.rootPath}}  <!-- works -->
{{../../rootPath}}  <!-- doesn't work -->