Count for Tagged Items in a Collection

Help
1

Hi All,

I decided to redo the structure of my site and move some of my Posts to Collections - to be more semantic and friendly. I had a couple an archive page set up that would show posts grouped by Tags. At the top was the list of tags with a post count badge, and below was a list of all the posts under those headings. I’ve managed to recreate the tag lists but I can’t seem to get a collection item count.

The old code used {{ site.tags[tag].size }} - so I’m wondering if there is an equivalent for getting the same information for tags used in collections?

Thanks!

2

Some more information:

{% assign collection_tags =  site.my-collection | map: 'tags' | join: ','  | split: ',' | uniq | sort %}

    <ul class="tags">
        {% for tag in collection_tags %}
            <li><a href="#{{ tag | slugify: 'pretty' }}" class="tag">{{ tag }}<span>({{ site.tags[tag].size }})</span></a></li>
        {% endfor %}
    </ul>
3

My memory is hazy on this, but when I tried to do something similar awhile back I don’t think it was possible, though things may have changed.

At the time site.tags and site.categories were only applied to posts and not available to all collection documents.

4

Thanks for the response. That seems to be the case. Can you recommend an alternative way of getting that value? I seem to be a little stuck on this one detail. Is there a way to query how many items each of the tags found in collection_tags?

5

I found the following on StackOverflow - http://stackoverflow.com/questions/36479756/counting-collection-tags-in-jekyll

It seems to do the job but is a bit verbose. Seems to be OK as a work around but would love there to be a simpler way.

6

This solution has been tested in a GitHub-hosted website:

I use Jekyll on my GitHub-hosted page, you can use group_by to achieve so:

{% assign alldocs = site.COLLECTIONNAME | <additional filtering and sorting> %}	
{% assign grouptag =  alldocs | map: 'tags' | join: ','  | split: ','  | group_by: tag %}
{%- for tag in grouptag -%}
    <h1>{{- tag.name -}} - {{tag.size}}</h1>
	{%- for document in alldocs -%}
    	{% if document.tags contains tag.name %}
        	 <p>{{- document.title -}}
		 {% endif %}
    {%- endfor -%}
{%- endfor -%}

Live example of a tag cloud including all the content of my blog (posts and projects) here

1 Like
7

@dieghernan Sorry to say your link is “404”…

8

Thank! Should be Tags | One world

1 Like
9

Sorry to say this not work any more on Jekyll >= 4.1.0. I implemented a solution in pure liquid that should work in any version (link):


{% assign alldocs = site.documents %}
{% assign alltags = alldocs | map: 'tags' | join: ',' | split: ',' %}
{% assign single_tags = alltags | uniq %}

<!-- Counting -->
{% assign count_tags = '' | split: ',' %}
{% assign n_tags = single_tags | size | minus: 1 %}
{% for i in (0..n_tags) %}
  {% assign count_this_tag = alltags | where_exp:"item", "item == single_tags[i]" | size %}
  {% assign count_tags = count_tags | push: count_this_tag %}
{% endfor %}

<!-- Extra: sort -->
{% assign items_max = count_tags | sort | last %}
{% assign sorted_tags = '' | split: ',' %}
{% assign sorted_count_tags = '' | split: ',' %}

{% for i in (1..items_max) reversed %}
  {% for j in (0..n_tags) %}
    {% if count_tags[j] == i %}
     {% assign sorted_tags = sorted_tags | push: single_tags[j] %}
     {% assign sorted_count_tags = sorted_count_tags | push: i %}
    {% endif %}
  {% endfor %}
{% endfor %}

{% assign sorted_tags = sorted_tags | uniq %}

 {%- for i in (0..n_tags) %}
      <p>{{ sorted_tags[i] }} - {{ sorted_count_tags[i] }} </p>
  {%- endfor -%}