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 <[email protected]> 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 <[email protected]> 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!
