From cfe278374d4c2b2a9d5bd7b6ebb7f95ff6a5864d Mon Sep 17 00:00:00 2001
From: Charles Haley <>
Date: Fri, 15 Apr 2011 21:13:37 +0100
Subject: [PATCH] Fix bug #762133

---
 src/calibre/library/caches.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/calibre/library/caches.py b/src/calibre/library/caches.py
index 5b22ad6787..9523795f28 100644
--- a/src/calibre/library/caches.py
+++ b/src/calibre/library/caches.py
@@ -413,12 +413,12 @@ class ResultCache(SearchQueryParser): # {{{
         cast = adjust = lambda x: x
 
         if query == 'false':
-            if dt == 'rating':
+            if dt == 'rating' or location == 'cover':
                 relop = lambda x,y: not bool(x)
             else:
                 relop = lambda x,y: x is None
         elif query == 'true':
-            if dt == 'rating':
+            if dt == 'rating' or location == 'cover':
                 relop = lambda x,y: bool(x)
             else:
                 relop = lambda x,y: x is not None