Hi Zac, I think the new variables you add to existing classes must be "objects". So, try "Integer numCheckins;" instead of int.
On Mar 25, 9:09 pm, Zac Witte <zacwi...@gmail.com> wrote: > I have a persistent class called Location, which already exists in the > datastore and I'm trying to add a new variable called numCheckins. Is > this possible without wiping out all the existing objects? My attempts > so far have resulted in the following error whenever I try to retrieve > one of the existing objects: > > WARNING: Error getting location from hash. Datastore entity with kind > Location and key Location(1) has a null property named numCheckins. > This property is mapped to is.loc.dataobjects.Location.numCheckins, > which cannot accept null values. > > I tried giving it a default value in the definition (ie. int > numCheckins = 0;) which had no effect. > > I tried adding the nullValue = NullValue.DEFAULT property to the > @Persistent annotation, but I get a message saying default values not > supported > > I'm still new to GAE - what is the correct way of handling this? > > 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 at http://groups.google.com/group/google-appengine-java?hl=en.
