[appengine-java] Re: How to store/retrieve inheritance and composition in Datastore

2010-01-20 Thread Federico Keen
Thanks guys, but I ended up migrating away. I'll wait until the datastore is a bit more developed :D On Jan 16, 6:54 am, datanucleus andy_jeffer...@yahoo.com wrote: I think Max has been improving the GAE/J inheritance support recently, so would be surprised if this isn't possible, at least in

[appengine-java] Re: How to store/retrieve inheritance and composition in Datastore

2010-01-15 Thread Federico Keen
as an extra property which it needs a read- time to create the instance.  Usually this is not needed because Twig can use the generic type of the Field to know that the Collection is of C's. JD On Jan 15, 3:59 am, Federico Keen federicok...@gmail.com wrote: Hi guys, I'm trying to use

[appengine-java] How to store/retrieve inheritance and composition in Datastore

2010-01-14 Thread Federico Keen
Hi guys, I'm trying to use the datastore with a model like this: Class A extends C { @Persistent private String a1; } Class B extends C { @Persistent private String b1; @Persistent private D dAttribute; } Class D { @Persistent private String d1; } Class