Add an external method to update the class of a persistent object.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@5763 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Extensions/CheckPortalTypes.py

@@ -10,3 +10,13 @@ def fixProductNames(self, REQUEST=None):
         msg += 'Change the Product Name of %s from %s to ERP5Type\n' % (contentType.getId(), contentType.product)
         contentType.product = 'ERP5Type'
   return msg
+
+def changeObjectClass(self, container, object_id, new_class):
+  """Creates a copy of object_id inside container, changing its class to
+  new_class"""
+  old_obj = container._getObj(object_id)
+  new_obj = new_class(object_id)
+  new_obj.__dict__.update(old_obj.__dict__)
+  container._setObject(object_id, new_obj)
+  
+