Well scopedsession.remove throws away the session, so yeah either don't call that , or set up the connection immediately on the next session.
On Wednesday, April 13, 2016, Kent Bower <k...@bowermail.net> wrote: > About a year ago you helped me ensure my scoped session gets the same > connection to the database, which might be important. > > I found out using "bind=connection" doesn't guarantee the session_maker > uses that connection if something went wrong with the session and > ScopedSession.remove() was called. Is there a way to guarantee this? > > See attached script that fails on version 1.0.12 > > Is this the intended behavior when sessionmaker has a specific connection > as bind? > > > > On Mon, Mar 23, 2015 at 12:40 PM, Michael Bayer <mike...@zzzcomputing.com > <javascript:_e(%7B%7D,'cvml','mike...@zzzcomputing.com');>> wrote: > >> >> >> Kent <jkentbo...@gmail.com >> <javascript:_e(%7B%7D,'cvml','jkentbo...@gmail.com');>> wrote: >> >> > In cases where we interact with the database session (a particular >> Connection) to, for example, obtain an application lock which is checked >> out from database for the lifetime of the database session (not just the >> duration of a transaction), it is important that I guarantee future scoped >> session instances get the same connection (and, for example, the >> pool_recycle or something else has thrown out that connection and grabbed a >> new one). >> > >> > Please advise me where I can best implement this guarantee. A Session >> subclass's connection() method seems it might be the appropriate place, but >> let me know if there is a better recipe. >> >> you’d want to create that Session associated with the Connection directly: >> >> my_session = scoped_session(bind=some_connection) >> >> then of course make sure you .close() it and .close() the connection at >> the end of the use of that session. >> >> >> >> > >> > The Session.connection() method's docs say: >> > "If this Session is configured with autocommit=False, either the >> Connection corresponding to the current transaction is returned, or if no >> transaction is in progress, a new one is begun and the Connection returned >> (note that no transactional state is established with the DBAPI until the >> first SQL statement is emitted)." >> > >> > If the session is one registered in my scoped registry, I'd like to >> always return the same connection to guarantee I am using the one with the >> database-side checked-out application lock. >> > >> > What's my best option? >> > >> > Thanks much! >> > >> > -- >> > 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 >> <javascript:_e(%7B%7D,'cvml','sqlalchemy%2bunsubscr...@googlegroups.com');> >> . >> > To post to this group, send email to sqlalchemy@googlegroups.com >> <javascript:_e(%7B%7D,'cvml','sqlalchemy@googlegroups.com');>. >> > Visit this group at http://groups.google.com/group/sqlalchemy. >> > For more options, visit https://groups.google.com/d/optout. >> >> -- >> You received this message because you are subscribed to a topic in the >> Google Groups "sqlalchemy" group. >> To unsubscribe from this topic, visit >> https://groups.google.com/d/topic/sqlalchemy/WcdRsvBTozk/unsubscribe. >> To unsubscribe from this group and all its topics, send an email to >> sqlalchemy+unsubscr...@googlegroups.com >> <javascript:_e(%7B%7D,'cvml','sqlalchemy%2bunsubscr...@googlegroups.com');> >> . >> To post to this group, send email to sqlalchemy@googlegroups.com >> <javascript:_e(%7B%7D,'cvml','sqlalchemy@googlegroups.com');>. >> Visit this group at http://groups.google.com/group/sqlalchemy. >> For more options, visit https://groups.google.com/d/optout. >> > > -- > 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 > <javascript:_e(%7B%7D,'cvml','sqlalchemy%2bunsubscr...@googlegroups.com');> > . > To post to this group, send email to sqlalchemy@googlegroups.com > <javascript:_e(%7B%7D,'cvml','sqlalchemy@googlegroups.com');>. > Visit this group at https://groups.google.com/group/sqlalchemy. > For more options, visit https://groups.google.com/d/optout. > -- 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 https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
