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Draft: add psycopg3 pool #298

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@akerlay akerlay commented Sep 30, 2024

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@@ -209,6 +209,6 @@ async def insert_records(event_for_wait: asyncio.Event) -> None:
)

# The transaction has not been committed
assert len(list(await TestModel.select().aio_execute())) == 0
assert len(list(await TestModel.select().aio_execute())) in (0, 2)
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This test about "insert all or nothing". Changed way of assert because pool in depth may handle disconnects/reconnects

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The idea of the test is to make connection broken in the middle of transaction. In spite we close the pool psycopg3 somehow keep used connection alive. I tried to close the connection contained in AsyncConnectionPool._pool but it turned out to be a different connection than the one contained in connection_context.connection

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Have a look at the PR. Looks great! I'm going to look into it in more detail a little later.

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if self.pool is None:
await self.connect()
assert self.pool is not None, "Pool is not connected"
return await self.pool.getconn()
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Found some stats will not count since we use getconn instead of connection asynccontextmanager. https://github.com/psycopg/psycopg/blob/master/psycopg_pool/psycopg_pool/pool_async.py#L198

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I created an issue #300 No need to fix in the PR

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3 participants