Hi Andreas, The field mapped with the "gae.parent-pk" is expected to hold a Key value or a key value encoded as string. Try this:
.... public ShoppingList(Shopper shopper) { Key shopperKey = KeyFactory.createKey(Shopper.class.getSimpleName(), shopper.getEmail()); shopperEmail = KeyFactory.keyToString(shopperKey); } ... Of course the shopperEmail field will not contain the email anymore, but the key of the shopper encoded as a string. You can still retrieve the email by converting it to a Key and calling Key.getName() (KeyFactory.stringToKey(shopperEmail).getName()). Marton On Sep 24, 3:13 pm, Andreas Kristensson <andreas.kristens...@gmail.com> wrote: > Hi, > > Trying to create ShoppingList child objects with parent set to > Shopper. Persisting Shopper works fine, but when I have created a > ShoppingList and tries to persist it I get the following exception: > > javax.jdo.JDOFatalUserException: Attempt was made to set parent to > me.test...@gmail.com but this cannot be converted into a Key. > > Well, email works fine as key in Shopper. Why won't it play nice with > extension gae.parent-pk? Anyone? > > ++ Code snippet > > @PersistenceCapable(identityType = IdentityType.APPLICATION) > Shopper > { > @PrimaryKey > private String email; > > ... > > public Shopper(String email) > { > this.email = email; > } > > } > > @PersistenceCapable(identityType = IdentityType.APPLICATION) > ShoppingList > { > @PrimaryKey > @Persistent(valueStrategy = IdGeneratorStrategy.IDENTITY) > private Key key; > > @Persistent > @Extension(vendorName = "datanucleus", key = "gae.parent-pk", value > = "true") > private String shopperEmail; > > ... > > public ShoppingList(Shopper shopper) > { > shopperEmail = shopper.getEmail(); > } > > } > > ++ End of code snippet --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---