Not related to JDO but... parent-child relationships are really simple to define with Twig... you don't need to use keys at all. Just use a @Entity(Parent) annotation or @Entity(Child) or you could even simply declare that any field named "parent" is automatically set to the parent object.
http://code.google.com/p/twig-persist/ Its an option if you don't need your code to run on another platform 2009/11/2 datanucleus <[email protected]> > > No idea if GAE/J's plugin supports this extension property but we > provide it in DataNucleus as a whole to only impose the "value > strategy" for the field when it is null (i.e not already set by the > user). Add this to the PK field that is being set > > @Extension(vendorName="datanucleus", key="strategy-when-notnull ", > value="false") > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
