Purely from experimenting with this (if anyone can identify a reference to a good doc that would be great) I've succeeded with the "just add the new fields" approach described above. The hiccups I've experienced are that you have to use nullable types for your new properties (e.g. an int won't work but an Integer will) and, if you don't implement and execute some sort of batch update-everything-to- good-non-null-defaults process queries containing the new properties won't work as you might expect.
Its definitely a source of some concern for me. Looking forward to the model migration segments of the "JDO/JPA Snippets That Work" series here (which seem like they are important enough to promote to blog posts or the like). --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en -~----------~----~----~----~------~----~------~--~---
