I know and am very thankful of the many items of advice I have received in
the past. But I am still frustrated - there must be some core element I am
not understanding.
The main issue is how to address items in wikitext, {{ [[ {{{ << < etc. I
know this all depends on how the item is being used but a simple cheat
sheet with many examples would be really useful. I don't find the
Tiddlywiki documentation easy to follow, bits are all over the place and
none of the examples address my problems I find.
For example, why does this not work?
<$button>
<$action-setfield
$tiddler="$:/TLS/exhibition_id"
$value={{!!exhibition_id}}
/>
<!--append the exhibition_id to the exhibition id field in each artwork-->
<$list filter="[tag[Mark]]">
<$action-setfield
$field="exhibition_id"
$value=<<TLSconcatenate {{!!exhibition_id}}
{{$:/TLS/exhibition_id}}>>
/>
</$list>
Link Artworks to Exhibition
</$button>
The result is the string {{!!exhibition_id}} {{$:/TLS/exhibition_id}}
stored in the exhibition_id field of each artwork selected and not the
transcluded values.
TLSconcatenate is a simple macro to concatenate two strings
\define TLSconcatenate(head tail) $head$$tail$
bobj
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