Issue
I would like to print tags that related with post / page with Jbake. But, after read the JBake documentation, especially for Data Model documentation so far I'm aware about:
- alltags
- tags
- tagged_posts
- tagged_documents
But, among those list there is no data model for tags that specific to post / page. It's possible to print tags specific to post / page?
I'm using:
- JBake version 2.7.0-rc.4
- Apache Freemarker as the template engine
Solution
After do trial and error finally I could list all tags from post / page.
JBake documentation for data model is only documented for global data model, so listed below model is for global use and is not what I want.
- alltags
- tags
- tagged_posts
- tagged_documents
The tags for post / page is actually exist within content data model. You can access it with ${content.tags}, this will list all tags that related with post / page that you want.
Now, to print it is the tricky part. Because the tags key within content model is only exist within post / page template.
Print tags on post / page template.
List all post / page tags is easier when you're working under post / page template. What you need to do is iterate the content.tags.
<#list content.tags as tag>
${tag}
</#list>
Print tags outside post / page template.
This situation is when I need to generate <meta name="keywords" content="" /> on the html head section. I need special handling when the meta keywords rendered outside post / page template, for example index.html.
Because when not in post / page template the content data model only contains two keys: rootpath and type. So, need special handling like below:
<#if (content.tags)?? >
<#-- Make sure we have tags model inside content -->
<#list content.tags as tag>
${tag}<#sep>, </#sep>
<#else>
<#-- in case that your page don't have any tags define, print default value if possible -->
</#list>
<#else>
<#-- There is no tags model inside content, print default value if possible -->
</#if>
Answered By - Sukma Wardana
