From 285811f8520af6207c2aa07eacafd438a6e93034 Mon Sep 17 00:00:00 2001
From: Michele Comitini <mcm@glisco.it>
Date: Mon, 24 Jun 2013 00:20:11 +0200
Subject: [PATCH] check that session_id exists before trying to renew session
 from the db

---
 gluon/globals.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/gluon/globals.py b/gluon/globals.py
index f4f0eb71..163fda2b 100644
--- a/gluon/globals.py
+++ b/gluon/globals.py
@@ -546,7 +546,9 @@ class Session(Storage):
 
         # else the session goes in db
         elif response.session_storage_type == 'db':
-
+            # verify that session_id exists
+            if not response.session_id:
+                return
             # verify if tablename was set or used in connect
             if response.session_table_name and tablename == 'web2py_session':
                 tablename = response.session_table_name