Hi, I was useful referring to this thread. You might be also useful for it.
http://groups.google.com/group/google-appengine-java/browse_thread/thread/fd8043e63ff6c22e/ Hope some of this helps. thanks. > I am not able to persist a HashMap field. This is how I define it: > > @Persistent(serialized = "true", defaultFetchGroup = "true") > private Map<String, Integer> items; > > When I create the Object which the Map is a field of, I instantiate > the Map as follows: > > items = new HashMap<String, Integer>(); > > When I update the "items" HashMap I try to persist the object by doing > the following: > > PersistenceManager pm = PMF.get().getPersistenceManager(); > // Query for Object (HashMap is a field of this Object) > // Update HashMap > pm.makePersistent(objectContainingHashMap); > > However, when I attempt to retrieve the object after persisting it and > read the HashMap it is always empty, as though I never updated it. > > Has anyone experienced this before? > > Thanks > > -- > 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 > athttp://groups.google.com/group/google-appengine-java?hl=en. -- 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.
