[theducks]

Originally Posted by rogue_librarian

If would like Calibre to display all records with a custom field different from a given resulst, i.e. a Boolean NOT.

I have

#my_field:"=foo"

working as expected. How would I search for fields other than foo? For a single letter a regular expression might work, something like

PHP Code:

#my_field:"~[^X]" 


but for a string?

Is there an easy way to tell Calibre to display #my_field except if it contains "foo"?

have you tried putting a "not" in front of your (string) search term?