Accessing _data in Jekyll (loop in loop)

Question

Given this YAML:

- maincategory:
    title: \"Projects\"
    subcategory:
        title: \"General\"
        item:
          title: \"Alpha\"
        item:
          


        

Answer 1

YAML:

- title: "Projects"
  subcategories:
    - title: "project-sub1"
      items:
        - title: "project-sub1-item1"
          href: "#"
        - title: "project-sub1-item2"
          href: "#"
    - title: "project-sub2"
      items:
        - title: "project-sub2-item1"
          href: "#"
        - title: "project-sub2-item2"
          href: "#"

- title: "Support"
  subcategories:
   - title: "support-sub1"
     items:
      - title: "support-sub1-item1"
        href: "#"
      - title: "support-sub1-item2"
        href: "#"

Nested loops:

{% for entry in site.data.entries %}
  
{{ entry.title }}
  {% for subcategory in entry.subcategories %}
    
{{ subcategory.title }}
    

    {% for item in subcategory.items %}
      
{{ item.title }}
    {% endfor %}
    
  {% endfor %}
{% endfor %}

Output:

Projects

  
project-sub1
  

    
project-sub1-item1
    
project-sub1-item2
  

  
project-sub2
  

    
project-sub2-item1
    
project-sub2-item2
  

Support

  
support-sub1
  

    
support-sub1-item1
    
support-sub1-item2