AWS lambda function not identify the handler in FastAPI project

[parth-patel97]

When I try to upload the FastAPI on the lambda function I get this error. Would anyone be able to help me with this?

My Porject structure :
README.md
main.py
requirements.txt
routes/api.py
src/dependencies/config.py
src/endpoints/textGenerator.py

My main.py :-

from fastapi import FastAPI,Depends
from routes.api import router as api_router
from mangum import Mangum

app = FastAPI()
app.include_router(api_router)

handler = Mangum(app=app)

{
"errorMessage": "The adapter was unable to infer a handler to use for the event. This is likely related to how the Lambda function was invoked. (Are you testing locally? Make sure the request payload is valid for a supported handler.)",
"errorType": "RuntimeError",
"stackTrace": [
" File "/opt/python/mangum/adapter.py", line 76, in call\n handler = self.infer(event, context)\n",
" File "/opt/python/mangum/adapter.py", line 68, in infer\n raise RuntimeError( # pragma: no cover\n"
]
}

[renkasiyas]

Any on this?

[ghost]

Hey @parth-patel97

Faced the same issue a couple of days ago and this PR helped me a lot, it seems to be a bug while trying to handle a proxy lambda, nothing about this is documented tho.

Hope that helps!