Hi all,
Does anyone know of a filter operator that accepts a list of titles as
input, the operand is the name of a list field of the current tiddler, and
the output is all input titles contained in the list field?
I've looked at the *listed* operator but it's not the same function. I'm
thinking of creating my own custom filter operator to do this.
My usecase is the following:
In my personal knowledge base setup, I have *topic*, *note*, *task*, and
*bookmark* tiddlers that are linked together. When I create these tiddlers,
I assign a unique identifier which I call *pkb-id*. This is currently just
the tiddler creation date in a specific format.
Let's say for a topic tiddler, I may have several note tiddlers linked to
it or several related bookmarks or tasks. To do this, I create a *notes* or
*bookmarks* field in the topic tiddler that list all the pkb IDs of the
related tiddlers. I then use a conditional view template that reads these
list fields and displays in the tiddler body all the related notes, tasks,
and bookmarks for each topic tiddler.
I have an existing implementation that works but that, I think, is horribly
inefficient. I use *enlist* and tobi beer's *filter* operator. For example,
if I want to list all the related notes of a topic tiddler, I currently do
this:
<$vars
subfilter="[all[tiddlers]!is[system]tag[$:/.em/type/note]field:pkb-id[%inputTitle%]]">
<$list filter="[enlist{!!notes}filter<subfilter>sort[title]]"
emptyMessage="There are currently no notes being referenced by this
topic"
template="$:/.em/templates/pkb-list-item"
/>
</$vars>
Basically, I loop thru all the note tiddlers for each ID listed in the
notes field, checking the *pkb-id* field of each tiddler if there's a
match. Imagine if I have a topic with a hundred related notes. That is
going to make things very, very slow.
So now what I want to do is loop thru all the notes and check if each
note's *pkb-id* is contained in the notes field of the current tiddler.
That will be just one loop no matter how many related notes there are.
Regards,
Eric
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