Bug: Unable to return an array in the event handler response

[sdangol]

Expected Behavior

I should be able to return an array when using event handlers.

Current Behavior

I get a typescript error when trying to return an array from the handler

Code snippet

import { Router } from '@aws-lambda-powertools/event-handler/experimental-rest';

const ddbDocClient = DynamoDBDocument.from(new DynamoDBClient());
const app = new Router();

app.get('/orders', async () => {
  const response = await ddbDocClient.send(
    new ScanCommand({
      TableName: 'OrdersWorkshop',
    })
  );
  if (response.Items && response.Items.length > 0) {
    return response.Items;
  }
  return { message: 'No orders found' };
});

export const lambdaHandler = (
  event: APIGatewayProxyEvent,
  context: Context
) => {
  app.resolve(event, context);
};

Steps to Reproduce

1. Create a lambda function with the code provided
2. There's an typescript error on the handler for get orders

Possible Solution

We have defined the HandlerResponse type as type HandlerResponse = Response | JSONObject;
Instead, it should be type HandlerResponse = Response | JSONValue; to support both array and objects

Powertools for AWS Lambda (TypeScript) version

latest

AWS Lambda function runtime

22.x

Packaging format used

npm

Execution logs

[tolutheo]

I can work on this

[sdangol]

Hi @tolutheo, do you need any help with this?

[tolutheo]

Hello @sdangol I am actively working on this and should create the PR this week.