From 5369eb78ade446413fb1d1a7c553920c6a6187d6 Mon Sep 17 00:00:00 2001
From: helmutm <helmutm@fd906abe-77d9-0310-91a1-e0d9ade77398>
Date: Tue, 1 May 2007 09:05:41 +0000
Subject: [PATCH] make migrateStorage() more tolerant: no migration when no
 adapter found

git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1706 fd906abe-77d9-0310-91a1-e0d9ade77398
---
 resource.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/resource.py b/resource.py
index 1017b84..ead05d9 100644
--- a/resource.py
+++ b/resource.py
@@ -227,7 +227,9 @@ class Resource(Image, Contained):
         oldAdapted = newAdapted = context
         oldTi = removeSecurityProxy(oldType.typeInterface)
         if oldTi is not None:
-            oldAdapted = oldTi(context)
+            oldAdapted = oldTi(context, None)
+        if oldAdapted is None: # nothing to migrate
+            return
         newTi = removeSecurityProxy(newType.typeInterface)
         newOptions = {}
         if newTi is not None: