From 3706c371fb3c0e6e0ac6ca0c56dab38c82ba01d9 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Fri, 10 Sep 2010 01:48:16 -0600
Subject: [PATCH] Allow book_on_device to be called before set_books_in_library

---
 src/calibre/gui2/device.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index e002fe916b..46259deb04 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -1325,6 +1325,9 @@ class DeviceMixin(object): # {{{
             self.book_db_uuid_path_map = None
             return
 
+        if not hasattr(self, 'db_book_uuid_cache'):
+            return loc
+
         string_pat = re.compile('(?u)\W|[_]')
         def clean_string(x):
             x = x.lower() if x else ''