Import Module error when deploying compiled typescript to lambda

Question

I'm converting some of my JS code to typescript and when deploying using serverless framework to a lambda on AWS and running it i'm getting the below error. At first I thought one of my imports was bad but it looks like everything is as expected.

{ "errorType": "Runtime.ImportModuleError", "errorMessage": "Error: Cannot find module 'tslib'\nRequire stack:\n- /var/task/handlers/Create.js\n- >/var/runtime/UserFunction.js\n- /var/runtime/index.js", "trace": [ "Runtime.ImportModuleError: Error: Cannot find module 'tslib'", "Require stack:", "- /var/task/handlers/Create.js", "- /var/runtime/UserFunction.js", "- /var/runtime/index.js", " at _loadUserApp (/var/runtime/UserFunction.js:100:13)", " at Object.module.exports.load (/var/runtime/UserFunction.js:140:17)", " at Object. (/var/runtime/index.js:43:30)", " at Module._compile (internal/modules/cjs/loader.js:956:30)", " at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)", " at Module.load (internal/modules/cjs/loader.js:812:32)", " at Function.Module._load (internal/modules/cjs/loader.js:724:14)", " at Function.Module.runMain (internal/modules/cjs/loader.js:1025:10)", " at internal/main/run_main_module.js:17:11" ] }

Serverless:

functions:
  createFamily:
    name: ${self:custom.createFamilyName}
    handler: handlers/Create.createFamily
    description: Lambda for Creating a family in the family service
    timeout: 30
    events:
      - http:
          path: /family
          method: post
          private: true

Handler:

import { APIGatewayEvent, Context, ProxyResult } from 'aws-lambda';
import { utilities } from '../handlers/utilities';
import { familyService } from '../services/FamilyService';
import { IFamily } from '../interfaces/IFamily';

let familyData: IFamily;
let serverReturn: IFamily;

export const createFamily = async (
    event: APIGatewayEvent,
    context: Context
): Promise<ProxyResult> => {
    try {
        if (!event.body) {
            return utilities.BuildResponse(400, JSON.stringify('Object to create was not provided'));
        }
        familyData = JSON.parse(event.body);
        serverReturn = await familyService.createFamily(familyData);

        if (!serverReturn) {
            return utilities.BuildResponse(404, JSON.stringify('Failed to create Family'));
        }

        return utilities.BuildResponse(201, JSON.stringify(serverReturn));
    } catch(err) {
        console.error('Family Service Create a family error: ', err);
        return utilities.BuildResponse(500, JSON.stringify('Family Service internal server error'));
    }
}

Allan Chua Allan Chua · Accepted Answer · 2020-01-21T06:34:11

You need to compile your typescript down to javascript and reference the transpiled output in the template.

Import Module error when deploying compiled typescript to lambda

1 Answers