Hi Tony, That's neat -- thanks! Thank you both again for the suggestions! Issue resolved :)
Best, Hubert On Wednesday, 20 June 2018 15:34:00 UTC+1, TonyM wrote: > > Hubert, > > I discovered the following by trial that may be helpful > > has[fieldname] returns tiddlers that have non-blank fields named fieldname > has:field[fieldname] returns tiddlers that have blank and non-blank fields > named fieldname > > List can be addressed as a field above as can tags, but list also has all > the list ops handling available just as tags is just a field but has all > the tag handling features available > > So has:field[list] will show all tiddlers with a list field and if you > then get[list] you can return the value in the field "list" and when empty > this will trigger the emptyMessage on the <$list widget. > > I hope this helps > Tony > > > On Wednesday, June 20, 2018 at 9:14:22 PM UTC+10, Hubert wrote: >> >> Hi, >> >> I'm trying to find a way to specifically check whether the current >> tiddler has a list field with no value. >> >> I've found this in the documentation but the below filter does not seem >> to return any relevant tiddlers: >> >> <$list filter="[<currentTiddler>has:list[emptyfield]]"> >> >> I'm not quite sure whether emptyfield >> <https://tiddlywiki.com/#has%20Operator%20(Examples)> itself is a valid >> operator or just a placeholder. >> >> I've also tried the below filter but I guess that this filter works on >> the assumption that the list must exist and it's only assumed to exist if >> there's a value assigned to it: >> >> <$list filter="[<currentTiddler>list[]]"> >> >> So, again no luck. >> >> Is there a way to denote the state of emptiness in a filter? :) Or >> perhaps there's a better way of solving this without resorting to macro >> substitution too much? (I've tried that successfully with emptyValue but it >> overcomplicates things a bit). >> >> Thanks in advance! >> > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/tiddlywiki. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/f92f70b4-ea69-4504-926d-8c7cb3735766%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
