Hello Daniel, > I hate to sound like a broken record, but this is how Hibernate does it. > New objects become associated with a session by calling session.save(obj), > and objects that already exist in the database become associated with the > session by calling session.update(obj). I wouldn't be easy enough to make a > custom base class that would associate the object with the "current" > session (whatever that may be). Here's a trivial example: (...)
This look quite nice, and I belive this is also what Michael has in mind. > I think it's better to leave this type of magic up to the user rather > than have it included in the core of SA itself. It should be an > explicit choice of the developer to use magic; it should not be the > default behavior of the library. Agreed. > > MyClass(_sa_session=s1) > > > >would probably solve it, but that doesn't look like something > >nice to have spread around the code. It'd probably be possible > >to use a metaclass to stick the keyword parameter somehow. > > As demonstrated above, a metaclass is not necessary. Although that would > certainly be possible. If you change SA itself, of course the metaclass isn't needed. :-) The metaclass would be needed if SA wasn't changed, and I had to introduce the _sa_session as a keyword argument dynamically in the patched __init__(), as I described above. That's certainly something I prefer not to do. > Stuff like this shouldn't involve too much deep hacking into the SA core if > it (the core) is kept simple, and doesn't do too much of its own magic. +1 -- Gustavo Niemeyer http://niemeyer.net ------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Sqlalchemy-users mailing list Sqlalchemy-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sqlalchemy-users
