call __repr__ instead of __str__ on objects

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@29591 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ZSQLCatalog/SQLCatalog.py

@@ -1464,7 +1464,7 @@ class Catalog(Folder,
               except ConflictError:
                 raise
               except:
-                LOG('SQLCatalog', WARNING, 'Failed to call method %s on %s' %
+                LOG('SQLCatalog', WARNING, 'Failed to call method %s on %r' %
                     (arg, object), error=sys.exc_info())
                 value = None
               if not disable_cache: