Have you tried with contains operator?
In direct filter transclusion you can use something like that
{{{ [all[current]!contains:id<value>then[I have to do X]else[] }}}
Then you can use the filter in a listwidget and use the variable created by
the listwidget.
El domingo, 21 de febrero de 2021 a las 10:47:35 UTC+1, Mat escribió:
> Need some filter help. Pseudocode:
>
> <$vars value={{foo!!value}}>
> filter=Among all tiddlers with an id field, if there is no tiddler with
> id:<value> then do X but if there is a tiddler with id:<value> then do
> nothing
> </$vars>
>
> I assume it is some kind of then ... else construct but I can't quite
> materialize it and I'm getting confused by how I loose the tiddler titles
> if I look at their field values. Maybe I need something with the subfilter
> operator but I'm not sure how... ?
>
> Thank you.
>
> <:-)
>
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