From 01e9a4961312587477475caa5bef09f35cd4ea80 Mon Sep 17 00:00:00 2001
From: Mike Bayer <mike_mp@zzzcomputing.com>
Date: Mon, 11 Jan 2010 16:10:11 +0000
Subject: [PATCH] ensure criterion is not None

---
 examples/beaker_caching/meta.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/beaker_caching/meta.py b/examples/beaker_caching/meta.py
index 026d2ce67d..c5a10c7f7a 100644
--- a/examples/beaker_caching/meta.py
+++ b/examples/beaker_caching/meta.py
@@ -183,7 +183,8 @@ def _params_from_query(query):
             value = value()
             
         v.append(value)
-    visitors.traverse(query._criterion, {}, {'bindparam':visit_bindparam})
+    if query._criterion is not None:
+        visitors.traverse(query._criterion, {}, {'bindparam':visit_bindparam})
     return v
 
 # Beaker CacheManager.  A home base for cache configurations.
-- 
2.47.3