Sort RSS feed by updated date

Support
1

Hi!

I’d like to sort my RSS feed by updated date, but it turns out surprisingly hard to do.

First, the update field is null if it’s not set in a page preface (that’s expected, I guess?), so I can’t just do pages | sort(attribute="updated"). I need to populate the missing dates with created values.

So, I tried simply setting the missing dates:

{%- for page in pages %}
	{% set page.updated = page.updated | default(value=page.date) %}
{% endfor %}

This didn’t work because set only creates new variables; it can’t add values to hashmaps.

Next, I tried building a new map updated ⇒ page and then populating it with values that miss that date:

{% set_global by_update = pages | group_by(attribute="updated") %}
{% for page in pages %}
	{% if page.updated %}
		{% continue %}
	{% endif %}
	{% set_global by_update = by_update | concat(with=page) %}
{% endfor %}

But it didn’t work either since you can’t concat to a map.

I’m a bit lost. It seems like a simple task, but I can’t crack it :thinking:
Any help is very appreciated!

2

That’s because rss isn’t designed with “last updated” in mind and rather with a static sorting.
Even if you succeed with your goal and sort stuff by last updated, rss readers won’t be able to check for that.
You’re looking for an atom feed!

3

Sorry, I’m confusing those two. I’m actually doing this in atom.rss template, so it’s an atom feed.