On 12 фев, 00:55, Michael Bayer <mike...@zzzcomputing.com> wrote: > yeah, youre using it exactly for what you should not be using it for, > to approximate the save() method on an active-record system. > building your whole app around a fake save() paradigm is not at all > how SQLA's unit of work was designed. You can of course create your > own CRUD system to issue inserts/updates yourself but then you dont > get all the benefits of the UOW. this makes me more sure of > deprecating it.
Yeah, now it's all a bit more clear for me... > > If so, what do you think about some kind of async events system? > > Something like PyDispatcher, Louie or Django's dispatch. It can be > > used not only with mapper's events but also with ddl-events. The main > > pro of this approach is the ability to subscribe to (or unsubscribe > > from) such events in run-time. > > the ORM and the schema system are two totally different systems. > MapperExtension and SessionExtension handle ORM events. the DDL() > object handles DDL events. The MapperExtension/SessionExtension can > easily be used to create an on-events system based on object > signature, like __on_save__(), etc. Extensions can also be set at any > time by saying mapper.extension.append(yourext), similar for Session. I understand that schema and orm has no similar. I spoke about events system which can be absolutely sender-reciever agnostic. Btw, after all I may agree with deprecation of flush([obj]) feature... And I'll rewrite my apps' db-part to be native for UOW and not to emulate active-record... (But it seems to me now that I'll use only one extension for each mapper which will be the bridge to dispatching system like PyDispatcher, because to call `connect(post_save, post_save_handler)` is much more simpler than to declare and append extension...) -- Angri --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
