This doesn't make any sense; entities in the GAE datastore cannot have multiple *parent* keys. However, your structure would work fine if you just dropped the @Parent annotation.
This may help: http://code.google.com/p/objectify-appengine/wiki/Concepts#Keys Jeff On Mon, Nov 22, 2010 at 10:22 AM, vaninh0 <[email protected]> wrote: > Hi Didier, > > with Objectify is possible to create a Entity with two distinct > childrens? > > example: > > class A { > @Id Long Id; > } > class B { > @Id Long Id; > } > class C { > @Id Long Id; > @Parent Key<A> a; > @Parent Key<B> b; > } > > regards, > vanio. > > On 20 nov, 14:41, Didier Durand <[email protected]> wrote: >> Hi, >> >> I would recommend Objectify (which I use heavily): seems to match your >> need. >> >> regards >> didier >> >> On Nov 20, 1:20 pm, Roberto Saccon <[email protected]> wrote: >> >> > maybe a good place to start is sourcecode of lowlevel-based frameworks >> > like slim3 or objectify >> > -- >> > Roberto >> >> > On Nov 20, 8:13 am, Tom <[email protected]> wrote: >> >> > > Hi there, >> >> > > I'm searching for information of entity relation ships in appengine. >> > > JPA for example supports relations between entites (one-to-one, >> > > ont-to-many, many-to-many). As far as I know by know the underlying >> > > datastore doesn't direktly support this and not join queries (different >> > > entities). >> >> > > How do you store Customer -> Orders in the datastore? Is there low >> > > level API example code? >> > > Would I store an entity "Customer" with attributes and a list of order >> > > ids? >> >> > > Any help highly appreciated. >> > > Thanks >> > > Tom >> >> > > -- > 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. > > -- 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.
