Connect with passwordless DSN does not work

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
42/100
Issue type
Bug
Clarity
Mostly clear
Activity status
Stale
Tech stack
postgresql, python, sqlalchemy
Domain
databases

Research direction

Reproduce the failure with the passwordless PostgreSQL DSN shown and the create_async_engine entry point. Trace the password-authentication path around the reported _auth_password_message_cleartext traceback; done means a passwordless connection no longer raises the NoneType encode error, with coverage for this case.

Written by the indexing model from the issue text.

Description

Basically as the title says: Trying to connect with a DSN that contains no password does not work

DSN in question:

@property def dsn(self) -> str: return f"postgresql+asyncpg://{self.pguser}@{self.pghost}:{self.pgport}/{self.pgdatabase}"

results, when used with

`
def get_db_url() -> str:
config = get_config()
return config.postgres.dsn

engine = create_async_engine(
get_db_url(),
echo=True,
future=True,
)
`

in the error:

ERROR: Traceback (most recent call last): File "asyncpg/protocol/coreproto.pyx", line 168, in asyncpg.protocol.protocol.CoreProtocol._process__auth File "asyncpg/protocol/coreproto.pyx", line 577, in asyncpg.protocol.protocol.CoreProtocol._parse_msg_authentication File "asyncpg/protocol/coreproto.pyx", line 672, in asyncpg.protocol.protocol.CoreProtocol._auth_password_message_cleartext AttributeError: 'NoneType' object has no attribute 'encode'

Dominant language
Python
Stars
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Forks
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Avg merge
2d 20h
Merged PRs (30d)
9

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