问题
I recently started working with AWS. I have integrated AWS Amplify using cognito user pools for my user management(login&signup) and it went perfect(User pool gets updated whenever a new user registers). Now i have added an Cognito Post confirmation trigger to save the registered email into database and here is my trigger codevar mysql = require('mysql');
var config = require('./config.json');
var pool = mysql.createPool({
host : config.dbhost,
user : config.dbuser,
password : config.dbpassword,
database : config.dbname
});
exports.handler = (event, context, callback) => {
let inserts = [event.request.userAttributes.email];
context.callbackWaitsForEmptyEventLoop = false; //prevents duplicate entry
pool.getConnection(function(error, connection) {
connection.query({
sql: 'INSERT INTO users (Email) VALUES (?);',
timeout: 40000, // 40s
values: inserts
}, function (error, results, fields) {
// And done with the connection.
connection.release();
// Handle error after the release.
if (error) callback(error);
else callback(null, results);
});
});
};
whenever a user registers and confirms his email this trigger invokes and throws me this error "Unrecognizable Lambda Output Cognito ". Even though it throws me this error in the background my DB is getting inserted with new registered email, but i am unable to redirect my page due to this. Any help will be appreciated. Thanks
Aravind
回答1:
Short answer: Replace callback(null, results); to callback(null, event);
Reason: You have to return the result that Cognito will use it for continue the authentication workflow. In this case, this is event object.
来源：https://stackoverflow.com/questions/59650985/aws-unrecognizable-lambda-output-cognito-error