AppEngine JDO tip regarding detachCopy()

In order to avoid JDO and/or serialization exceptions, I always call some form of persistenceManager.detachCopy() before returning objects from the Datastore back to GWT. I discovered today that you must set any non-persistent properties of the object after calling detachCopy(). My initial inclination is that detachCopy() does not copy properties annotated with @NotPersistent, but I have to do a little more testing…