> For example, when adding a field that uses a primitve type to an object. > You can't query all objects with JDO pretending to store them in the > recently modified object, because null cannot be asigned to the non-null > field, but you can query the objects using the low level api and set a > default value for the new field.
And in terms of the JDO implementation, the only thing needed for it to handle that seamlessly would be to support the use of a "default" value for any new field, so when reading old data that doesn't have that field it would apply the default value to the field. This is specifiable in JDO metadata, so is only waiting for the GAE/J plugin to be modified to use it. -- 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 [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-java?hl=en.
