AWS Lambda Dynamo AWS SDK Node.js Query Method Issue - aws-lambda

Question

Hello I have the following Lambda code based on Node.js. I am unable to call the query method to retrieve the data.
Input: { key: 'value' } -- Using Test Event Input.
var AWS = require('aws-sdk');
AWS.config.update({region: 'us-east-2'});
var ddb = new AWS.DynamoDB.DocumentClient({apiVersion: '2012-08-10'});
exports.handler = async (event, context) => {
const params = {
TableName: 'Chapter',
IndexName: 'subjectId-index', // Global Secondary Index
KeyConditionExpression: 'subjectId = :subjectId',
ExpressionAttributeValues: {
':subjectId': event.key,
},
};
console.log(JSON.stringify(params));
ddb.query(params, (err, data) => {
// Console.log('Not executing this part !!!')
if (err) console.log(err);
console.log(data);
});
};
The query method not even being called or any error being logged. I really could use some help.

Answer 1

As you have console logs, you can debug your code using cloudwatch to check your lambda logs.
You can select your lambda and if you are seeing any execution logs you can click for more details and you will find your console logs there
Call context.done
Sample program you might try. I just wrote it not tried
var AWS = require('aws-sdk');
AWS.config.update({ region: 'us-east-2' });
var ddb = new AWS.DynamoDB.DocumentClient({ apiVersion: '2012-08-10' });
const executeQuery = (params) => {
return new Promise(function (resolve, reject) {
ddb.query(params, (err, data) => {
if (err) reject(err);
resolve(data);
});
});
}
exports.handler = async (event, context) => {
const params = {
TableName: 'Chapter',
IndexName: 'subjectId-index', // Global Secondary Index
KeyConditionExpression: 'subjectId = :subjectId',
ExpressionAttributeValues: {
':subjectId': event.key,
},
};
console.log(JSON.stringify(params));
executeQuery(params).then((data) => {
console.log('sucess');
context.done(data);
}).catch((err) => {
console.log('Error occurred');
context.done(error);
})
};