On Tue, Sep 24, 2013 at 5:40 PM, Nicholas Long <nick.studioc...@gmail.com>wrote:
My mind keeps going back to events but of course there's the limitation to > modifying Session state while handling various events. ( > http://docs.sqlalchemy.org/en/rel_0_7/orm/events.html#sqlalchemy.orm.events.MapperEvents.after_update > ) > > But what about using the SQL Expression API? > > *Relevant code snippet:* > > class MyModel(Base): > __tablename__ = "MyTable" > priid = Column(Integer(), primary_key=True) > secid = Column(Integer()) > > > @listens_for(MyModel, 'after_insert') > def mymodel_after_insert(mapper, connection, target): > mytable = MyModel.__table__ > priid = target.priid > statement = (mytable.update() > .where(mytable.c.priid == priid) > .values(secid=priid)) > connection.execute(statement) > > > Full code for reference: > http://paste.pound-python.org/show/WVciGm4jCxgvz84jKrZy/ > SQLA echo: http://paste.pound-python.org/show/hSyCGisr0X5eupVdyk3f/ > > The echo looks sane, though I can't be sure how the SQLAchemy internals > are affected by this. > > Thank you for your input, Michael. > While I'm not using the 'two-step' approach this time, there will be future column renames that are far more insidious and may require it, so I would also like to know if the above will work as well. :) -- - Ken Lareau -- 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.
