Bug: v2.40.0 undocumented breaking change in Router

[karvetskiy]

Expected Behaviour

In out code we accessed current_event directly from Router class befor 2.40.0

Current Behaviour

In 2.40.0 version current_event available in AppSyncResolver only

Code snippet

from aws_lambda_powertools.event_handler import AppSyncResolver
from aws_lambda_powertools.event_handler.appsync import Router

user_router = Router()

@user_router.resolver(field_name="user")
def get_user() -> dict:
    return service.get_user_by_id(user_id=user_router.current_event.identity.sub)

app = AppSyncResolver()
app.include_router(user_router)

Possible Solution

No response

Steps to Reproduce

call current_event attribute from Router class

Powertools for AWS Lambda (Python) version

2.40.0

AWS Lambda function runtime

3.12

Packaging format used

Lambda Layers

Debugging logs

No response

[boring-cyborg]

Thanks for opening your first issue here! We'll come back to you as soon as we can.
In the meantime, check out the #python channel on our Powertools for AWS Lambda Discord: Invite link

[leandrodamascena]

Checking now.

[leandrodamascena]

Hi @karvetskiy, thanks for opening this issue and reporting this bug. Our tests didn't catch accessing current_event using the Router object directly and because of this we have this breaking change in this release, sorry about that. I'm working to fix and will release a new version in a few minutes.

Thanks

[leandrodamascena]

Hey @karvetskiy! If I publish a pre-release on Pypi, can you test if the issue is resolved in your environment before we release a new patch release? Thanks

[karvetskiy]

Hey @leandrodamascena! Just checked alpha version, still can't access current_event.
Looks like new Router class in event_handler.graphql_appsync.router inhered from wrong implementation of BaseRouter class.
It has different implementation in v2.39.1 (see code)

[heitorlessa]

he hasn't published yet, will ping you shortly @karvetskiy

[heitorlessa]

PR incoming, we've been wrestling with static typing and additional tests to be quadruple sure this would work on areas we were missing tests too.

Once we merge and publish the alpha release we ping you

[heitorlessa]

kicked off pre-release (should be in PyPi in ~6 minutes or so).. https://github.com/aws-powertools/powertools-lambda-python/actions/runs/9712027684

[leandrodamascena]

Hey @karvetskiy! alpha release is available. Can you test pls?

https://pypi.org/project/aws-lambda-powertools/2.40.1a1/

[github-actions]

This is now released under 2.40.1 version!