Unable to store timestamp in Dynamo DB using Nodejs 16 version Lambda - aws-lambda

Question

I am unable to store timestamp in Dynamo DB using Node JS Lambda. i am new to Node JS.
while run the test case, it was stored. but while trigger this lambda function getting error.
i was try to insert below timestamp
LastUpdateTimestamp
The date and time this contact was last updated, in UTC time.
Type: String (yyyy-mm-ddThh:mm:ssZ)
// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
// SPDX-License-Identifier: MIT-0
const AWS = require('aws-sdk');
const ddb = new AWS.DynamoDB();
exports.handler = async (event) => {
var surveyResults = {};
var data = event.Details.ContactData.Attributes; // extract the contact attributes from the Amazon Connect event
Object.keys(data).forEach(element => {
if (element.startsWith("survey_result_")) {
surveyResults[element] = { S: data[element] };
}
});
var params = {
TableName: process.env.TABLE,
Item: {
contactId: { S: event.Details.ContactData.ContactId},
date: { S: event.Details.ContactData.LastUpdateTimestamp},
surveyId: { S: event.Details.ContactData.Attributes.surveyId },
...surveyResults
}
}
try {
await ddb.putItem(params).promise(); // write the object to the DynamoDB table
} catch (err) {
console.log(err);
}
const response = {
statusCode: 200,
body: JSON.stringify('OK'),
};
return response;
};
Test Data:
{
"Name": "ContactFlowEvent",
"Details": {
"ContactData": {
"Attributes": {
"surveyId": "123456",
"survey_result_1": "4",
"survey_result_2": "5"
},
"Channel": "VOICE",
"ContactId": "5ca32fbd-8f92-46af-92a5-6b0f970f0efe",
"LastUpdateTimestamp": "2023-02-14T06:52:29Z",
"CustomerEndpoint": {
"Address": "[phone]",
"Type": "TELEPHONE_NUMBER"
},
"InitialContactId": "5ca32fbd-8f92-46af-92a5-6b0f970f0efe",
"InitiationMethod": "API",
"InstanceARN": "arn:aws:connect:us-east-1:123456789012:instance/9308c2a1-9bc6-4cea-8290-6c0b4a6d38fa",
"MediaStreams": {
"Customer": {
"Audio": {
"StartFragmentNumber": "91343852333181432392682062622220590765191907586",
"StartTimestamp": "1565781909613",
"StreamARN": "arn:aws:kinesisvideo:us-east-1:123456789012:stream/connect-contact-a3d73b84-ce0e-479a-a9dc-5637c9d30ac9/1565272947806"
}
}
},
"PreviousContactId": "5ca32fbd-8f92-46af-92a5-6b0f970f0efe",
"Queue": null,
"SystemEndpoint": {
"Address": "[phone]",
"Type": "TELEPHONE_NUMBER"
}
},
"Parameters": {}
}
}
Error:
2023-02-15T14:10:26.426Z 94fad25e-bcdb-443b-95c0-47640bfaba34 INFO ValidationException: Supplied AttributeValue is empty, must contain exactly one of the supported datatypes
at Request.extractError (/var/runtime/node_modules/aws-sdk/lib/protocol/json.js:52:27)
at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:106:20)
at Request.emit (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:78:10)
at Request.emit (/var/runtime/node_modules/aws-sdk/lib/request.js:686:14)
at Request.transition (/var/runtime/node_modules/aws-sdk/lib/request.js:22:10)
at AcceptorStateMachine.runTo (/var/runtime/node_modules/aws-sdk/lib/state_machine.js:14:12)
at /var/runtime/node_modules/aws-sdk/lib/state_machine.js:26:10
at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:38:9)
at Request.<anonymous> (/var/runtime/node_modules/aws-sdk/lib/request.js:688:12)
at Request.callListeners (/var/runtime/node_modules/aws-sdk/lib/sequential_executor.js:116:18) {
code: 'ValidationException',
time: 2023-02-15T14:10:26.328Z,
requestId: 'F5JJOCF20D507JCFRO7FEMAH6VVV4KQNSO5AEMVJF66Q9ASUAAJG',
statusCode: 400,
retryable: false,
retryDelay: 15.458319111471575
}

Answer 1

You state that ...surveyResults contains the following:
"survey_result_1": "4",
"survey_result_2": "5"
This is not DynamoDB JSON. You need to modify the values to suit the correct format as you have done with the other values.

Answer 2

const AWS = require('aws-sdk');
const ddb = new AWS.DynamoDB();
exports.handler = async (event) => {
var surveyResults = {};
var data = event.Details.ContactData.Attributes; // extract the contact attributes from the Amazon Connect event
Object.keys(data).forEach(element => {
if (element.startsWith("survey_result_")) {
surveyResults[element] = { S: data[element] };
}
});
var contact_params = {
ContactId: event.Details.ContactData.InitialContactId, /* required */
InstanceId: 'place your instance id' /* required */
};
var connect = new AWS.Connect();
console.log('describeContact');
/*connect.describeContact(contact_params, function(err, data) {
if (err) console.log(err, err.stack); // an error occurred
else console.log(data); // successful response
});*/
const attributes = await connect.describeContact(contact_params).promise();
console.log(attributes)
console.log(typeof attributes.Contact.LastUpdateTimestamp)
var agent_params = {
InstanceId: 'place your instance id', /* required */
UserId: attributes.Contact.AgentInfo.Id /* required */
};
const agent = await connect.describeUser(agent_params).promise();
let agent_username = "";
if(agent_username != null){
agent_username = agent.User.Username;
}
console.log(agent)
var params = {
TableName: process.env.TABLE,
Item: {
contactId: { S: event.Details.ContactData.ContactId},
surveyId: { S: event.Details.ContactData.Attributes.surveyId },
date: { S: attributes.Contact.LastUpdateTimestamp.toLocaleDateString()},
time: { S: attributes.Contact.LastUpdateTimestamp.toLocaleTimeString()},
agentname: {S: agent_username},
...surveyResults
}
}
try {
await ddb.putItem(params).promise(); // write the object to the DynamoDB table
} catch (err) {
console.log(err);
}
const response = {
statusCode: 200,
body: JSON.stringify('OK'),
};
return response;
};