04-19-2015, 08:41 PM | #1 |
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Device: Kindle
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Searching for empty
I have a user-defined field, #kindlecollections, that I use to maintain categories in conjunction with the Kindle Collections plugin. It's defined as comma-separated text. I want to search and create a virtual library with all books in the library where this field is not defined. The following are among the things I've tried that don't work:
#kindlecollections:" " #kindlecollections:"" #kindlecollections = " " #kindlecollections EQ " " Reading http://manual.calibre-ebook.com/regexp.html was not helpful. I've used grep and cousins and various kinds of SQL for a third of a century, and I'm frustrated. I don't need the concepts explained; I need a pointer to the *exact* syntax. |
04-19-2015, 08:43 PM | #2 |
Well trained by Cats
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false is what you want
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04-20-2015, 12:14 AM | #3 |
Ex-Helpdesk Junkie
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You're overthinking it
http://manual.calibre-ebook.com/gui.html#search-sort tl;dr Code:
columnname:search Code:
#kindlecollections:false |
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