How to use currentTiddler inside the filter to the ListWidget or list-links macro?

[rybak]

The alternative question/title to this discussion is "How to emulate MediaWiki's categorization system in TiddlyWiki5?"

The tag system in TiddlyWiki5 is very nice. I like how every tag can have a corresponding tiddler, which crucially can be tagged itself. In fact, I've (ab)used this functionality to produce something that resembles MediaWiki's category system. For example, I created a tiddler titled Category:Journal with the following TiddlyWiki 5 wikitext:

<<list-links filter:"[tag[Category:Journal]]">>

which creates a viewable listing of all tiddlers tagged with Category:Journal, which doesn't require clicking on the tag pill. The listing will include other tags, whose tiddlers are tagged with Category:Journal; while the tiddler Category:Journal can then be tagged with Category:Texts, for example. See also documentation of <<list-links>> macro.

This works in principle, but this approach requires retyping the name of the tag every time. It sounds like something which should be solvable with variable currentTiddler or {{!!title}} (both are similar to MediaWiki's {{FULLPAGENAME}}), but I couldn't figure it out, none of the following work:

<<list-links filter:[tag[{{!!title}}]]>>
<<list-links filter:"[tag[{{!!title}}]]">>
<<list-links filter:[tag[<<currentTiddler>>]]>>
<<list-links filter:"[tag[<<currentTiddler>>]]">>

I tried using procedures for it, but nothing I tried made it work:

\procedure myCategoryView(name:"Parameter name is not defined")

* Plain text in procedure works: <<currentTiddler>>, <<name>>
* Can even generate a tag pill: <<tag $(currentTiddler)$ >>, but not with procedure's parameters: <<tag <<name>> >>

List-links doesn't work in either variant:

1 – `<<currentTiddler>>`
<<list-links filter:"[tag[<<currentTiddler>>]]">>

2 – `$(currentTiddler)$`
<<list-links filter:"[tag[$(currentTiddler)$]]">>

3 – `{{!!title}}`
<<list-links filter:"[tag[{{!!title}}]]">>

4 – with procedure's parameters `<<name>>`
<<list-links filter:"[tag[<<name>>]]">>


\end

----
!!! Using the procedure:

<<myCategoryView name:"<<storyTiddler>>">>

----
<<myCategoryView name:"{{!!title}}">>

[rybak]

I've also tried using the ListWidget, without success:

\procedure myCategoryView(name:"Name is not defined")

1 – `<<currentTiddler>>`
<$list filter="[tag[<<currentTiddler>>]sort[title]]"/>

2 – `$(currentTiddler)$`
<$list filter="[tag[$(currentTiddler)$]sort[title]]"/>

3 – `{{!!title}}`
<$list filter="[tag[{{!!title}}]sort[title]]"/>

4 – with procedure's parameters `<<name>>`
<$list filter="[tag[<<name>>]sort[title]]"/>

\end

----
!!! Using the procedure:

<<myCategoryView name:"<<storyTiddler>>">>

----
<<myCategoryView name:"{{!!title}}">>

[rybak]

Figured out were I went wrong: while inside a filter, the variables have a different syntax, with single angle brackets and without square brackets. See section "Special parameters" in Introduction to filter notation.

The fixed wikitext is then:

<<list-links filter:"[tag<currentTiddler>]">>

<$list filter="[tag<currentTiddler>sort[title]]"/>

Though output of ListWidget needs heavy tweaking to resemble output of <<list-links>>:

<ul>
  <$list filter="[tag<currentTiddler>sort[title]]">
    <li><$link to=<<currentTiddler>> /></li>
  </$list>
</ul>

[Jermolene]

Hi @rybak glad you got it figured out. Questions about wikitext may get more response at https://talk.tiddlywiki.org

[rybak]

Questions about wikitext may get more response at https://talk.tiddlywiki.org/

Thanks, I've posted a follow-up there.