Node MySQL Executing Queries Asyncronously - mysql

Question

I have the following Node/Express route which is used to post data to a MySQL server. It first adds a new user to a table and then takes the id of the new user and adds some more info to a profile table. The second query is dependent on the first one so they run sequentially.
I have written the following code and it runs correctly and does the job.
routes.post('/register', (req,res) => {
console.log('api req: ', req.body)
const email = req.body.email
const password = 'test'// req.body.password
if (!email || !password) return res.status(400).json({type: 'error', message: 'Please provide email and password'})
const hash = bcrypt.hash(password, 10)
// console.log('hash is ...', hash )
var sqlquery = "INSERT INTO user (username, first_name, last_name, email, password) VALUES ('test#gmail.com', 'Dan', 'Brown', 'test#gmail.com', 'test')"
db.query(sqlquery, (error, results) => {
if (error) return res.status(400).json({type: 'error', message: error})
if (results.length == 0) {
// do something
} else {
// run another query based on results from previous query
var profilequery = "INSERT INTO userprofile (user_id, address, age) VALUES (" + results.insertId + ", 'test address', 25)"
db.query(profilequery, (error1, results1) => {
if (error) return res.status(400).json({type: 'error1', message: error1})
console.log("profile inserted, ID: " + results1)
})
}
console.log("1 record inserted, ID: " + results.insertId);
res.json({type: 'success', message: 'user registered', results})
return results
})
})
There are two problems:
Problem 1: This code is not asynchronous. I would love to use async/await on this code. Really appreciate if someone can help me convert this into async code.
Problem 2: I have tried to use bcrypt to hash the password. However, if I use the hashed value in the query, the query fails because bcrypt returns a promise and not the actual hashed password. I do I resolve this.

Answer 1

not tested:
asyncQuery = (query, args) => {
return new Promise((resolve, reject) => {
db.query(query, function (err, result, fields) {
if (err)
return reject(err);
resolve(result);
});
});
}
routes.post('/register', (req, res) => {
console.log('api req: ', req.body)
const email = req.body.email
const password = 'test'// req.body.password
if (!email || !password) return res.status(400).json({ type: 'error', message: 'Please provide email and password' })
const hash = bcrypt.hash(password, 10)
// console.log('hash is ...', hash )
const sqlquery = "INSERT INTO user (username, first_name, last_name, email, password) VALUES ('test#gmail.com', 'Dan', 'Brown', 'test#gmail.com', 'test')"
let firstresult, secondresult;
asyncQuery(sqlquery)
.then(rows => {
firstresult = rows;
const profilequery = `INSERT INTO userprofile (user_id, address, age) VALUES ("${rows.insertId}", 'test address', 25)`;
return asyncQuery(profilequery)
})
.then(rows => {
secondresult = rows;
})
.then( () => {
console.log(`firstresult:${firstresult}`)
console.log(`firstresult:${secondresult}`)
res.json({ type: 'success', message: 'user registered', results })
})
.catch(rows => {
console.log(`Error:${rows}`)
})
})