> I can insert new rows fine, and see them in the Development server > datastore viewer. But when I try to access the new property contains > "NoneType: None". > You can assign a default value to the property, it will be used when an entity has no value for the property:
boat = db.StringProperty(default='my default value') > How can I force the Datastore to add this new property without having > to delete all the old data and re-add? > You don't have to re-create your entities, if you want you can iterate through them and update the property value: entity.boat = 'my default value' entity.put() If you have many entities, you will have to do the update in multiple requests, probably using the __key__ index to properly iterate over all of them. But before doing this, consider using the 'default' parameter first, it's much easier. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
