Data inserted in MYSQL DB from Node.js is undefined - mysql

Question

When I insert data into my DB it says that it was successful but upon checking my DB, all of my fields are null. I am getting undefined values on my firstName,lastName, mobile, and email columns.
I'm really having a hard time debugging as I'm pretty new to JS. I hope anyone can point out what's the problem.
This is the model for Guest
var Guest = function(guest) {
this.firstName = guest.firstName;
this.lastName = guest.lastName;
this.mobile = guest.mobile;
this.email = guest.email;
}
// Insert Guest Data to DB
Guest.createGuest = (guestRequestData, result) => {
db.query('INSERT INTO guest SET ? ', guestRequestData, (error, response) => {
if(error){
console.log('Error while inserting data');
result(null, error);
}else{
console.log('Guest created successfully');
result(null, response);
}
})
}
module.exports = Guest;
And this the controller
// Create New Guest
exports.createNewGuest = (request, response) => {
const guestRequestData = new GuestModel(request.body);
console.log('Request Data', guestRequestData);
// Check Null
if(request.body.constructor === Object && Object(request.body).length === 0){
response.send(400).send({success: false, message: 'Please fill all fields'});
}else{
GuestModel.createGuest(guestRequestData, (error, guest) => {
if(error)
response.send(error);
response.json({status: true, message: 'Guest Created Successfully', data: guest.insertId})
})
}
}

Answer 1

There is a clear example how to insert data into MySQL database using node.js: https://www.mysqltutorial.org/mysql-nodejs/insert/
So in your case would look something like this:
db.query('INSERT INTO guest (firstName, lastName, mobile, email) VALUES (?, ?, ?, ?)', guestRequestData, (error, response) => {
if(error){
console.log('Error while inserting data');
result(null, error);
}else{
console.log('Guest created successfully');
result(null, response);
}
})
where the guestRequestData has the following structure:
["Your first name", "Your last name", "Your mobile", "Your email"]
Make sure you convert the guestRequestData to this format.