From 2a73d58532ec9661f1622621bdf14b0722be9d00 Mon Sep 17 00:00:00 2001
From: Damien Elmes <git@ichi2.net>
Date: Mon, 26 Sep 2011 08:06:13 +0900
Subject: [PATCH] make close() idempotent; add isEmpty()

---
 anki/deck.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/anki/deck.py b/anki/deck.py
index 39eefb2ed..f699ac781 100644
--- a/anki/deck.py
+++ b/anki/deck.py
@@ -118,8 +118,8 @@ crt=?, mod=?, scm=?, dty=?, usn=?, ls=?, conf=?""",
 
     def close(self, save=True):
         "Disconnect from DB."
-        self.cleanup()
         if self.db:
+            self.cleanup()
             if save:
                 self.save()
             else:
@@ -332,6 +332,9 @@ crt=?, mod=?, scm=?, dty=?, usn=?, ls=?, conf=?""",
     # Cards
     ##########################################################################
 
+    def isEmpty(self):
+        return not self.db.scalar("select 1 from cards limit 1")
+
     def cardCount(self):
         return self.db.scalar("select count() from cards")