Just want to share what I did. I use JDOQL to query the preferred child object. >From that child object, I use its key to get the parent key, and from that parent key I have the primary key of the parent object. Then, I get the parent and child object together in the same entity group using the primary key. It's all done in the same transaction. I hope this help a bit.
On Nov 17, 11:04 pm, leszek <leszek.ptokar...@gmail.com> wrote: > It is not supported in Google App Engine JPA/JDO > > http://code.google.com/intl/pl/appengine/docs/java/datastore/usingjdo... > > ---------------- > "Join" queries. You cannot use a field of a child entity in a filter > when performing a query on the parent kind. Note that you can test the > parent's relationship field directly in query using a key. > --------------- > > The only way is to "denormalization". Simple duplicate fields in > Employ and ContactInfo you want to query on. -- 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-j...@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.
