Aha, Base (declarative_base) don't need proper connection to db in any point. Connection with database must be established only when execute queries. Thank you very much!
2014-02-17 3:10 GMT+02:00 Michael Bayer <mike...@zzzcomputing.com>: > > On Feb 16, 2014, at 7:28 PM, Alexander Perepelica < > perepelica.a...@gmail.com> wrote: > > Great, so I define in my code > > session = None > Base = declarative_base() > > class Model1(Base): > id = .... > > and after user input host IP we can execute code > > engine = create_engine(“ > postgresql+psycopg2://scott:tiger@somehostname/test”, > poolclass=NullPool) > > session = sessionmaker(bind=engine) > > and last point how can set new session to Base? > > > > you don’t. It’s only when you use session.query(MyClass) or > session.add(MyClass()) that those states are associated. > > > > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sqlalchemy+unsubscr...@googlegroups.com. > To post to this group, send email to sqlalchemy@googlegroups.com. > Visit this group at http://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/groups/opt_out.
