node.js: DynamoDB DocumentClient returning empty object - node.js

Question

I am using DynamoDB local and can create and delete table. I created a table with only one key like below
const tablePromise = dynamodb.listTables({})
.promise()
.then((data) => {
const exists = data.TableNames
.filter(name => {
return name === tableNameLogin;
})
.length > 0;
if (exists) {
return Promise.resolve();
}
else {
const params = {
TableName: tableNameLogin,
KeySchema: [
{ AttributeName: "email", KeyType: "HASH"}, //Partition key
],
AttributeDefinitions: [
{ AttributeName: "email", AttributeType: "S" },
],
ProvisionedThroughput: {
ReadCapacityUnits: 10,
WriteCapacityUnits: 10
}
};
dynamodb.createTable(params, function(err, data){
if (err) {
console.error("Unable to create table. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log("Created table. Table description JSON:", JSON.stringify(data, null, 2));
}
});
}
});
Now I want to insert an item in the table following example doc at AWS.
var docClient = new AWS.DynamoDB.DocumentClient();
var tableNameLogin = "Login"
var emailLogin = "abc#gmail.com";
var params = {
TableName:tableNameLogin,
Item:{
"email": emailLogin,
"info":{
"password": "08083928"
}
}
};
docClient.put(params, function(err, data) {
if (err) {
console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
} else {
console.log("Added item:", JSON.stringify(data, null, 2));
}
});
When I run the insert item code, I get Added item: {} Why does it output an empty object? Is it actually inserting anything? I looked into this callback example but this time it doesn't output anything.

Answer 1

You need to add ReturnValues: 'ALL_OLD' to your put params. It will look like as mentioned below.
var params = {
TableName:tableNameLogin,
Item:{
"email": emailLogin,
"info":{
"password": "08083928"
}
},
ReturnValues: 'ALL_OLD'
};
For more details, you can follow this https://github.com/aws/aws-sdk-js/issues/803