Find empty fields
Hi,
I would like to find any books in my library that have no comments so I can use a plugin to update this field in bulk mode. But I cannot find the syntax for finding the empty field. I tried several options like
comments:"~Empty"
comments:"~^$"
comments:""
But no succes.
Is this possible, and if so, how would I go about it?
Thanks in advance,
Eric.
|