Any chance this could be considered as well? Currently the DAL doesn't allow you to set the parent which is required for GAE entity groups.
http://groups.google.com/group/web2py/browse_thread/thread/3c11deb2bfadf207/96a4324e5fd0cf71?lnk=gst&q=GAE+parent#96a4324e5fd0cf71 On Jun 22, 7:35 am, Carles <carle...@gmail.com> wrote: > Ok, I'll try. > > Carles > > El 21/06/2010, a las 19:03, mdipierro <mdipie...@cs.depaul.edu> escribió: > > > The only file you need to look into is gluon/contrib/gql.py > > > specifically the select() function which calls filter returns the Rows > > object > > > On Jun 21, 11:55 am, Carles Gonzalez <carle...@gmail.com> wrote: > >> Ok, thanks! I would like to make the patch myself, but the innards of > >> web2py are somewhat complex... > > >> Thanks again, Carles. > > >> On Mon, Jun 21, 2010 at 6:43 PM, mdipierro <mdipie...@cs.depaul.edu> wrote: > >>> Probably it would not be hard to implement. I will look into this next > >>> week but if somebody sends me a patch before that I will take it. > > >>> Massimo > > >>> On Jun 21, 9:25 am, Carles Gonzalez <carle...@gmail.com> wrote: > >>>> Hi, > > >>>> I have developed some applications in web2py, and 2 are running > >>>> currently in gae, but now i have serious problem. > > >>>> My current project is a social application, and when i design > >>>> (example) the tables to make an user follow the actions other user > >>>> (twitter like) I find that many-to-many relationships in app-engine > >>>> are not easily supported. > > >>>> From my understanding using the tools present in web2py right i would > >>>> need to do a lot of processing in memory, an that would hurt > >>>> performance greatly. > > >>>> The pattern proposed by app store developers uses lists and "parent" > >>>> relationship: > > >>>> class Message(db.Model): > >>>> sender = db.StringProperty() > >>>> body = db.TextProperty() > > >>>> class MessageIndex(db.Model): > >>>> receivers = db.StringListProperty() > > >>>> indexes = MessageIndex.all(keys_only = True).filter('receivers = ', > >>>> user_id) > >>>> keys = [k.parent() for k in indexes) > >>>> messages = db.get(keys) > > >>>> For using that pattern in web2py I would need a method for specifying > >>>> the parent of a model instance. Can I specify that relationship using > >>>> any method I don't know? If not, would it be hard to implement? > > >>>> Thanks in advance!
