I'm calling a Lambda from another Lambda asynchronously using:
payload = {"id":item['id']} invoke_lambda = lambda_client.invoke(FunctionName="process", InvocationType="Event", Payload=json.dumps(payload)) # Use InvocationType="RequestResponse" for synchronous run This is likely rather obvious, but I can't find the documentation for it - how do I access the payload in the second lambda defined as:
def process(event, context): (...) Your payload should be in the body of the event dict. Try json.loads(event['body']).get('id').
Neither of the suggested solutions worked for me in 2024, but
id = event['id'] did.
On the second lambda, you just need to do id = context['id']. When it's an asynchronous call, event doesn't come with the body key.
"errorMessage": "'LambdaContext' object is not subscriptable" if I used context to retrieve payload.Possible duplicate question -- Nodejs - Invoke an AWS.Lambda function from within another lambda function
Note, you may want to take a look at Step Functions to prevent Lambda A from incurring costs as it waits for Lambda B to complete.
