You have now: employee.addComputer(computer); pm.close();
Replace with: employee.addComputer(computer); pm.makePersistent(employee); pm.close(); You update entity but don't persist it again. Also replace: @Persistent public Set<Long> computerKeys = new HashSet<Long>(); with: @Persistent(defaultFetchGroup = "true") public Set<Long> computerKeys = new HashSet<Long>(); I'm not sure if method: "employeeCheck.computerKeys.isEmpty())" launches "lazy loading". --~--~---------~--~----~------------~-------~--~----~ 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-java@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 -~----------~----~----~----~------~----~------~--~---