On Tue, Jan 26, 2010 at 4:40 PM, Jeff Schnitzer <j...@infohazard.org> wrote: > > If you want to ask "what albums are this photo in?" (equivalent to > "what messages are waiting for me" in the video), you query like this: > > OQuery<PhotoIndex> query = > createQuery(PhotoIndex.class).filter("photos", photoKey); > List<OKey<Album>> keys = ofy.prepareKeysOnly(query).asList(); > List<Album> albums = ofy.get(keys);
I made a mistake here - you need to grab the parents of the keys. So the full process is: OQuery<PhotoIndex> query = createQuery(PhotoIndex.class).filter("photos", photoKey); List<OKey<Album>> albumKeys = new ArrayList<OKey<Album>>(); for (OKey<PhotoIndex> indexKey: ofy.prepareKeysOnly(query).asIterable()) albumKeys.add(indexKey.getParent()); List<Album> albums = ofy.get(albumKeys); We're making some API changes in v2 which will make this a little prettier. Jeff -- 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.