My brain is obviously incapable of understanding TW documentation. Any way, here is the code
\define makeimg(isbn) [img[http://covers.librarything.com/devkey/dev-key-goes-here/medium/isbn/$isbn$]] <$macrocall $name="makeimg" isbn={{!!isbn}} /> I need to basically add options for "if no isbn, use isbn13. If neither, then use this generic book cover image" isbn and isbn13 are both fields - when I imported, if the field was empty, the field was not set up in the tiddler, so it's not a blank field, it's a non-existent field. Half my books have one or the other, some have both, some have neither. Something like that... On Sunday, January 3, 2021 at 7:09:24 AM UTC-6 saq.i...@gmail.com wrote: > Sounds like something I would do either with filters use the else[] > operator, or with nested <$view> widgets (where the content of a view > widget is only displayed if the target field is absent). > > https://tiddlywiki.com/#ViewWidget > > Hard to be more specific without seeing your code. > > On Sunday, January 3, 2021 at 1:32:35 PM UTC+1 dix...@gmail.com wrote: > >> >> I have a working macro, but just realized that the field it uses is >> sometimes not present. There is an alternate field I would like to use in >> its place. I also need to use a 'dummy' result if *both* fields are not >> present. >> >> My dozens of searches through TW documentation and this group have so far >> proven futile. Could use some help... >> >> -- 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 tiddlywiki+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/7fa984d4-f124-4857-a853-1100a6cbd5ban%40googlegroups.com.
