Unexpected behavior from RedisDsn + BaseSettings

[kfreezen]

Code with unexpected behavior

from pydantic import RedisDsn
from pydantic_settings import SettingsConfigDict, BaseSettings


class Settings(BaseSettings):
    redis_uri: RedisDsn = "redis://redis"
    model_config = SettingsConfigDict(env_file=".env")


print(Settings().redis_uri)
print(RedisDsn("redis://redis"))

Output:

redis://redis:6379/0
redis://redis

I would have expected RedisDsn(...) to give the same output as Settings().redis_uri. Is there a reason that this is not the case?

I would also like to point out that passing str(settings.redis_uri) to redis.asyncio.Redis causes it to choke because it seems their URL parsing is faulty. I'm surprised no-one else has run into this issue. They append :6379/0 for a beautiful URL of redis://redis:6379/0:6379/0.

It is very possible, of course, that I'm doing something wrong.

[kfreezen]

I'll leave my blunder with the redis library up for everyone to see. I discovered I needed to use Redis.from_url which I was not doing. Which would probably explain why no one else has this issue.

[kfreezen]

I'm still interested to know why the difference in behavior in that code, however.