You're right, it's not entirely clear why Model.get_by_id(ids) requires all entities to have the same parent, while Model.get(keys) doesn't have that requirement. Presumably some implementation detail. But whatever the reason, using Model.get(keys) is a good idea. I'll give that a shot when I get a chance. Thanks for the idea!
On Jan 29, 4:06 pm, Danny Tuppeny <da...@tuppeny.com> wrote: > I don't know if I was drunk when I sent this message, but I don't > think it makes any sense at all. If you're calling get() on SS, it's > quite clear what the kind is! > > On Jan 28, 7:20 am, Danny Tuppeny <da...@tuppeny.com> wrote: > > > On Jan 24, 12:29 am, dburns <drrnb...@gmail.com> wrote: > > > > Making a User instance the parent of a SS (snapshot) instance seems > > > like a natural fit, except then I can't fetch all the favourites via: > > > favs = SS.get_by_id(user.fav_ids). The reason is that all parents > > > have to be the same to use SS.get_by_id (according > > > tohttp://code.google.com/appengine/docs/python/datastore/modelclass.htm...), > > > but those favourites may have been created by various users (hence the > > > parents would be different). > > > Can you use SS.get(keys) instead? > > > I think the reason that get_by_id requires the parent is because IDs > > are not full keys (and presumably an ID can be duplicated for > > different kinds). If you create Keys for them (you'll need to know > > their Kind), you could call SS.get(keys) and get them all in one go. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appeng...@googlegroups.com. To unsubscribe from this group, send email to google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
