I don't think that we can help you unless we see some of your code where you do your persisting! (Am I correct to presume that you are using JDO?)
On Aug 2, 2:28 pm, Sachin Salunkhe <[email protected]> wrote: > I am trying to save and retrieve data in google app engine in > hierarchical manner. > > 1. > > In such a case ,where I am using key's for reference to another entity > (i.e parent --> child) > > @PersistenceCapable(identityType = IdentityType.APPLICATION, > detachable = "true") public class Item { > > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > private Key key; > > @Persistent > private List<Key> childs; > > // > > } > > there is no replication of data. > > Is it possible that child entities get saved automatically when parent > is saved in above case where I am using Keys ? > > 2. > > If I tried same without keys .. > > @PersistenceCapable(identityType = IdentityType.APPLICATION, > detachable = "true") public class Item { > > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > private Key key; > > @Persistent > private List<Child> childs; > > // > > } > > In this case when I saved parent entity then child's also get saved > automatically . But then there is replication of data i.e for > different child's of same parent there are separate copies of > parent's. > > Can anybody give me some Ideas and Links ?? -- 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 [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
