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Prevent sqlalchemy from refetching the old_state_id as it will never change (#40982)

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Disable expire_on_commit for the event writer. Since we never expect the
old_state_id to change in the database, it was never worth the expense of
refetching the id after the commit.
This commit is contained in:
J. Nick Koston 2020-10-01 12:57:52 -05:00 committed by Paulus Schoutsen
parent fd91d21b28
commit 953a1ddc8c
1 changed files with 3 additions and 1 deletions
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4
homeassistant/components/recorder/__init__.py
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@ -573,7 +573,9 @@ class Recorder(threading.Thread):
sqlalchemy_event.listen(self.engine, "connect", setup_recorder_connection)
Base.metadata.create_all(self.engine)
self.get_session = scoped_session(sessionmaker(bind=self.engine))
self.get_session = scoped_session(
sessionmaker(bind=self.engine, expire_on_commit=False)
)
def _close_connection(self):
"""Close the connection."""