You need tread gently with updates to your models. When you are adding new properties, provide a default value.
Cheers Tonny On 20 Okt., 06:28, Tim <[email protected]> wrote: > first i create an entity of "note"(includes some fields), then i > deploy it to appengine, and add some record to it. > > but, then i change the structure of this entity "note"(add a field of > "isVisible"), when i deploy my app again, you know the record before > their value of "isVisible" is null, and then my problem come out. > > how can I clear my datastore? when i wanna view my datastore , it > can't work. > > please help, thanks in advance. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
