use PersistentMapping as selection storage if the site is configured as using...

use PersistentMapping as selection storage if the site is configured as using memcached but no memcached plugin found. this workaround is required for updating sites where memcached storage are already used.


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@27762 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/SelectionTool.py

@@ -149,7 +149,10 @@ class SelectionTool( BaseTool, UniqueObject, SimpleItem ):
           storage = 'selection_data'
         elif storage == 'Memcached Tool':
           memcached_plugin_list = self.portal_memcached.contentValues(portal_type='Memcached Plugin', sort_on='int_index')
-          storage = memcached_plugin_list[0].getRelativeUrl()
+          if len(memcached_plugin_list):
+            storage = memcached_plugin_list[0].getRelativeUrl()
+          else:
+            storage = 'selection_data'
       return storage
 
     def isMemcachedUsed(self):