I asked this a while back on the Spotlight mailing list and never
received a reply. Maybe someone here knows.
Begin forwarded message:
From: Nick Zitzmann <[email protected]>
Date: May 20, 2009 6:38:36 PM MDT
To: [email protected]
Subject: Making an "undefined" Spotlight NSPredicate?
X-Mailer: Apple Mail (2.935.3)
I did search the archives, and didn't see anything. How do I make a
NSPredicate for an NSMetadataQuery which evaluates to true if a key-
value is undefined by the metadata? I'm trying to run a query that
returns true if something is not present.
I already tried "com_chronos_ourkey == NULL", and when attempting to
set the predicate in the NSMetadataQuery object, it raises this
exception: "NSComparisonPredicate with a right expression which is
not a string, number, or date given to NSMetadataQuery
(com_chronos_ourkey == nil)"
Nick Zitzmann
<http://www.chronosnet.com/>
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Nick Zitzmann
<http://www.chronosnet.com/>
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