On Wed, Feb 16, 2011 at 9:22 AM, Landreville <ja...@deadtreepages.com> wrote: > Hi, > I am trying to set a session variable (call a function with a value) > in postgres at the beginning of every session that SQLAlchemy starts. > I'm using the session variable to specify the currently logged in user > for an auditing system (just a trigger on a couple tables). I have > tried the before_commit ORM event, but it will set the variable after > the other commands so the trigger does not pick it up. I also tried > the before_flush event, but it seems to have a simlar problem -- it > doesn't always set the variable at the beginning of the session. > > Is there a way to run a command at the beginning of every session, > before anything else is run?
I'm going to hazard a response. I needed to do the same thing, so I subclassed ConnectionProxy and overrode the begin method. Then when creating my engine I did this: engine = create_engine(..., proxy=MyConnectionProxySubclass()) > Also, in these cases should I be using Session.execute or > Session.connection.execute()? I would also like an answer to that -- I typically use session.execute whenever possible, except when reflecting tables (pretty much anything that takes a 'bind' argument) I have to use session.connection(). -- Jon -- 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.
