On Thu, 14 Aug 2008, Patrick R. Michaud wrote:
On Mon, Aug 11, 2008 at 01:15:22AM +0200, noskule wrote:
This is a planned feature but it doesn't exist yet. On
http://www.pmwiki.org/wiki/PmWiki/RoadMap it's given as
"Allow link= option to do wildcards".
I very recently came across a use case for this...
We use categories such as 'ToDo', 'ToDo-Christian', 'ToDo-Anders' to tag
pages that contain things that need to be done. Or maybe the entire page
is just a to do list. The point is that many pages have these tags.
The sidebar then contains the link [[!To do]], i.e. a link to the page
Category.ToDo, which of course lists all pages that contain the tag
'ToDo'. However, since we don't want to clutter sidebar with all the
links [[!ToDo-Christian]], [[!ToDo-Anders]], these category pages are
listed on the page Cateogry.ToDo. In other words, Category.ToDo contains:
(:pagelist group=Category name="Category.ToDo-*" :)
However, what we would also like to do is to add:
(:pagelist link="Category.ToDo-*" :)
since that would allow us to list all pages that in some sense need to be
acted upon.
Note that I actually tried the above, thinking it would work and was very
confused that it didn't... It wasn't until I read Patrick's post that I
realized the functionlity isn't implemented yet.
We currently use the workaround that any page that is tagged with
[[!ToDo-<x>]] must also be tagged with [[!ToDo]].
Writing the above, I realize that a better approach to tagging the pages
might be using page text variables. In other words, for each to be tagged,
add something like:
(:todo: Christian:)
Then it's just a matter of searching for all pages that have the PTV
'todo' set....
Maybe tags should really be a special case of PTV, or rather that tags and
categories should be implemented via PTV?
However, I'm seriously considering Christian Ridderström's
suggestion for being able to do set operations on pagelists:
(:pagelist link=Category.Personal save=list1 :)
(:pagelist link=Category.Professional save=list2 :)
(:pagelist from=list1+list2 count=15 list=blog order=-ctime :)
hm, what would be the benefit/usecase of this method, compared to
wildcards? The only thing I see is that it isn't possible to exclude
categories.
The biggest benefit is that this is easier to implement, plus it allows
greater flexibility than simple wildcards in links. For example, it
would be possible to say arbitrarily complex things like "all pages in
category ABC that aren't on trail DEF" and the like.
As a concrete example, with the above functionality I could ask to find
all 'todo'-pages, except those tagged with e.g. 'Todo-Anders'.
Best regards,
/Christian
--
Christian Ridderström, +46-8-768 39 44 http://www.md.kth.se/~chr
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