I edited my original post before hitting submit, and managed to clear out
the important stuff. Ha.
On Wednesday, April 6, 2016 at 2:42:38 PM UTC-4, Jeff Dairiki wrote:
>
> I use a reified request property to create the SqlAlchemy session.
> The factory function adds an "add_finished_callback" to close the session.
I do that in all my personal/work apps.
Right now, I'm using the stock scaffold with global scoped session for a
side project that I'm open sourcing.
> (Why don't you have access to the request?)
>
I'm trying to keep things simple and do this in app/__init__.py.
the `main` function only has a config object, the request doesn't exist yet.
def main(global_config, **settings):
config = Configurator(settings=settings)
wsgi_app = config.make_wsgi_app()
return wsgi_app
so I need to somehow use a hook that has a request object. two things that
came to mind: tweens and events.
def db_cleanup__tween_factory(handler, registry):
def db_cleanup__tween(request):
try:
response = handler(request)
return response
finally:
DBSession.close()
return db_cleanup__tween
def db_cleanup__event(event):
event.request.add_finished_callback(lambda request:
DBSession.close())
def main(global_config, **settings):
...
config.add_tween('app.db_cleanup__tween_factory', over=EXCVIEW)
config.add_subscriber("app.db_cleanup__event",
"pyramid.events.NewRequest")
...
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