> I'd like to avoid having to lookup the object using the Key and then > updating it, and was wondering if I could get away with using the > makePersistentAll method as a shortcut. The docs seem to imply I > could do this if the object was detached, but not sure how it would > behave if it was a re-constructed representation of the > PersistenceCapable object as opposed to one retrieved directly from > the datastore.
Passing in a "transient" (non-detached, and non-managed) object (to any makePersistent method) will attempt to persist it ... with the identity that the object has. If its PK fields are set by you and that 'id' corresponds to an object in the datastore then you will get a JDOUserException since the object with that 'id' already exists. -- 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-j...@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.
