Postlist by tag -> handle zero items

[plaindocs]

Hi, and thanks for the work on ablog

Any suggestions on how to handle the zero posts in a postlist situation. I think current behavious is to use all posts, but what I'd like is to be able to show aletrnative content if there are no posts.

[nabobalis]

Sorry, I am not sure I follow. Do you have an example?

[plaindocs]

Hi @nabobalis thanks for the response.

If I try to make a list of posts

.. postlist:: 10
   :date: %B %d, %Y
   :format: {title} - {date}
   :list-style: none
   :tags: a-tag-without-post

And I know that there are 0 posts with that tag I'd like to show alternate content. I think current behavior is to return latest posts with any tag.

[nabobalis]

Ah ok. I understand now.

Unfortunately I don't have an answer on how to do that. If I get some time I will look into adding that as an extra feature to postlist. Ablog and how it works is still quite new to me.

[plaindocs]

Many thanks :-)

I guess the easiest might be including text in th postlist construct itself. That way you can check inside the code, and not worry about returning the condition?

.. postlist:: 10
📅 %B %d, %Y
:format: {title} - {date}
:list-style: none
:tags: a-tag-without-post
:ifempty: More news soon

[nabobalis]

Yeah, something like that would be my initial idea as well.

[rayalan]

Here's another possibility, based on post.py having this logic:

if colls:
  # Some stuff
else:
  posts = list(blog.recent(node.attributes['length'], docname, **node.attributes))

I suspect the way to nicely implement this is something like

...
else:
  if node.has_content:
    node.replace_self(child)
    continue
  else: 
    posts = list(blog.recent(...))

The advantage to this approach is that it lets one define a fairly rich default by doing something like this:

.. postlist::

  This is my first paragraph that shows up in an empty post list.

  And this paragraph also shows up.