Cursor cannot be used with externally-managed transaction

Asyncpg 0.31.0, installed from pip and running against a local pg database. This is not a deployment issue, but rather an issue w/the check performed by Cursor._check_ready().

https://github.com/MagicStack/asyncpg/blob/db8ecc2a38e16fb0c090aef6f5506547c2831c24/asyncpg/cursor.py#L114-L116

Working on implementing streaming results for Peewee and I'm running into an issue w/the Cursor _check_ready(). Currently it requires an asyncpg-managed transaction in order to proceed. Is there a reason it doesn't do a similar check to the one here, where it queries is_in_transaction()?

https://github.com/MagicStack/asyncpg/blob/db8ecc2a38e16fb0c090aef6f5506547c2831c24/asyncpg/connection.py#L1532

I'd like to be able to use server-side cursors with Peewee's library-managed transactions.

从 asyncpg/cursor.py 中的 Cursor._check_ready() 开始，然后将其事务检查与 connection.py 中的 is_in_transaction() 进行比较。确定就绪状态是否能够识别外部管理的事务，同时不破坏 asyncpg 管理的游标；完成标准是服务器端游标能够与 Peewee 的库管理事务一起工作。