Using a scoped session with a session generator and I didn't want
expire_on_commit to be False for everything, so setting it using the
Session constructor wouldn't work properly. If a session was created prior
to the one that needed that flag, it'd give me a ProtocolError since it
couldn't change the session after it'd already been created. Manually
setting the expire_on_commit attribute in the session and setting it back
after it was done worked fine, though, and didn't mess with the scoped
session pool:
with db_session() as db:
db.expire_on_commit = False
# do stuff
db.expire_on_commit = True
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