[chaley]

Assuming that #shelf is a text-type (perhaps with a fixed set of values) then this advanced rule should work.


Here is the text shown in the dialog

program:
	switch(
		field('#enum2'),
		'^read$', 'success.png',
		'^to-read$', 'play-button.png',
		'^backlog$', 'line.png',
		'^dnf$', 'error.png',
		'^dont-touch$', 'forbidden-light-grey.png',
		'^currently-reading$', 'medical-1.png',
		'^favorite$', 'eye-1.png',
		'')

The search fields (read, to-read, etc) are regular expressions, which is why they are anchored (begin with ^ and end with $).

I used #enum2 because I don't have a column named #shelf.