From 4f0ca1264211dd0dd4ca4286500df8751d9c30de Mon Sep 17 00:00:00 2001
From: Charles Haley <>
Date: Sat, 4 Aug 2012 14:33:12 +0200
Subject: [PATCH] Fix isbn:false not matching if other identifiers are attached
 to the book.

---
 src/calibre/library/caches.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/calibre/library/caches.py b/src/calibre/library/caches.py
index a516681fab..99470f3835 100644
--- a/src/calibre/library/caches.py
+++ b/src/calibre/library/caches.py
@@ -568,6 +568,7 @@ class ResultCache(SearchQueryParser): # {{{
                     matches.add(id_)
                 continue
 
+            add_if_valq_false = valq == 'false'
             pairs = [p.strip() for p in item[loc].split(split_char)]
             for pair in pairs:
                 parts = pair.split(':')
@@ -583,10 +584,14 @@ class ResultCache(SearchQueryParser): # {{{
                             continue
                     elif valq == 'false':
                         if v:
+                            add_if_valq_false = False
                             continue
                     elif not _match(valq, v, valq_mkind):
                         continue
                 matches.add(id_)
+
+            if add_if_valq_false:
+                matches.add(id_)
         return matches
 
     def _matchkind(self, query):