Help request for hierarchical subject classification

I am trying to write my own theme and do something that I thought would be very simple, but I cannot get it going after several days,

What I want is to classify my posts by subject at multiple levels e.g. Fiction / Detective, Fiction / Fantasy, History / Ancient.

Then I need:

  • a sidebar with the categories in hierarchical pages
  • when the user clicks on a category, a page with the list of the most recent n posts on that subject (linked to the individual posts)
    • it would be nice to have the choice of auto-generated or explicit page for this, but that is not essential

Could someone give me the actual text that I need to type into Hugo files for this.

I use this to sort my posts to series.
You can do this in frontmatter

subject = ["Fiction", "Fantasy", "Fiction-Fantasy"]    

in the config you should add this

   "subject" = "subjects"
   subject = "/:section/:title" 

You can add the post do multiple subjects. For hierarchies you have to build a special list template.

Instead of using Sections to show relationships between your content, you could use a Category Taxonomy. This would make defining your Category “list” and “single” templates easier. Also, when adding another category, a user could just edit content front matter, instead of creating a new section.

Edit: looks like @ju52 beat me to it :stuck_out_tongue_winking_eye:

I have come up with a test solution, so any comments would be good. This is just the bare bones of a solution.

Content file content/stuff/test1:

title: "Test1"
date: 2018-11-26T12:11:59+08:00
- subj2
This is a test.

Add some more similar files, Some should have topic subj1.


 title: "Subj1"
 date: 2018-11-26T13:03:22+08:00
 draft: false
     identifier: subj1
   All about subject 1.


 title: "Subj2"
 date: 2018-11-26T13:03:22+08:00
     parent: subj1
     identifier: subj2
 All about subject 2.

layouts/subjects/single.html (part only):

    {{ $urlSplit := ( index (split .URL "/") 2) }}
            {{ $tax := .Site.Taxonomies.topics }}
            {{ $topic := (index $tax  $urlSplit)  }}
              {{ range $topic.Pages }}
              <li><a href="{{ .URL }}">{{ .Name }} </a></li>
              {{ end }}


         <li><a href="/">Home</a>
           {{ range .Site.Menus.main }}
         <li>< a href="{{.URL}}"> {{ .Name }}</a></li>
         {{if .HasChildren }}
           {{range .Children}}
           <li><a href="{{.URL}}"> {{ .Name }}</a></li>