Hi there,
I’m building a theme for Zola which require a related posts sections. Here is how I made the related posts list at the moment:
{% if category %}
{% set related_posts = get_section(path="posts/_index.md")
| get(key="pages")
| sort(attribute="date")
| filter(attribute="taxonomies.categories", value=[category])
| slice(end=3)
%}
<div class="post-items-list columns">
{% for post in related_posts %}
{#
Since we cannot use a negative filter the only solution to remove the current page from the
related_posts is the following condition
#}
{% if post.permalink != page.permalink %}
{{ macros::post_item(post=post) }}
{% endif %}
{% endfor %}
</div>
{% endif %}
The main problem is that I can’t filter the posts with a negative filter, like: | filter(attribute="permalink", not_value=page.permalink) so sometimes related_posts contains the current post and I need to filter using an if condition in the display loop. But this solution doesn’t suit me because I end with 2 posts in related posts instead of 3.
Am I missing something or there is no other solution at the moment to achieve that?
It seems like it would be easier to do something like:
{% set related_posts = get_taxonomy(kind="categories", term=post.category) %}
and just iterate on that with and skip the current page as you do. But the term argument or get_taxonomy doesn’t currently exist so you would need to compare the term in the loop.
There are no negative filters in Tera right now An exclude or something could be added to complement filter
Thanks for your insight. My question wasn’t complete, I need to limit my related_posts to 3 items. So I ended writing something like this:
{% if category %}
{% set related_posts = get_taxonomy(kind="categories")
| get(key="items")
| filter(attribute="name", value=category)
| first
| get(key="pages")
%}
{% set_global related_posts_counter = 0 %}
{% if related_posts | length > 0 %}
<h2>{{ trans(key="related_posts", lang=lang) }}</h2>
<div class="post-items-list columns">
{% for post in related_posts %}
{#
Since we cannot use a negative filter the only solution to remove the current page from the
related_posts and having max 3 related posts is the following condition - @awea 20191207
#}
{% if post.permalink != page.permalink and related_posts_counter <= 2 %}
{{ macros::post_item(post=post) }}
{% set_global related_posts_counter = related_posts_counter + 1 %}
{% endif %}
{% endfor %}
</div>
{% endif %}
{% endif %}
The term argument in get_taxonomy would be great to only fetch the given category with its items ^^
Yeah it’s quite verbose x)
I think the term argument makes sense to have, I’ll think about it today and create a GH issue for it if I don’t see any issues with it.
I’ve tried to repeat that code to get related posts (it’s really valuable thing), but I can’t understand what I supposed to do, if I have two or more tags\categories per article?
The theme I’m working on use only one category per post and multiple tags per post. So I get the first category (the first because taxonomies.categories is a list) of the current post then I can use it in the related_posts above.
{% if page.taxonomies.categories %}
{% set category = page.taxonomies.categories | first %}
<small>{{ category }}</small>
{% endif %}
but I can’t understand what I supposed to do, if I have two or more tags\categories per article?
You can still use the set category above. But If you want to work with multiple tags\categories and fetch related_posts using those taxonomies you’ll need to rewrite the set related_posts part.
An