Express async route logging undefined after await - node.js

Question

I am writing an Express endpoint in Typescript to update a user's password in the database, but having some trouble with multiple queries/synchronous code.
My problem is right now I am trying to await the return of a function but it doesn't seem to be awaiting.
My route looks like this:
router.put("/:userId", validateUser, async (req: any, res: Response) => {
const result: any = await updatePassword(req.body.password, req.body.confirmPassword, req.params.userId);
console.log(result) //LOGS UNDEFINED????
if (result.status !== 200) res.status(result.status).send({ message: result.message, code: result.code });
res.send("Success!");
});
and that updatePassword function looks like this:
const updatePassword = async (password: string, confirmPassword: string, userId: string) => {
if (password !== confirmPassword) {
return { status: 409, message: Errors.mismatchingPasswordMessage, code: Errors.mismatchingPasswordCode };
}
const hashedPassword = bcrypt.hashSync(password, 10);
//update the password in the DB
pool.query("UPDATE users SET password = ? WHERE userId = ?", [hashedPassword, userId], (err: MysqlError, result: any) => {
if (err) {
console.log(err);
return { status: 500, message: err.message, code: err.code };
}
if (result.changedRows !== 1) {
return { status: 500, message: "Password could not be updated!" };
}
return { status: 200 };
});
}
Why is this the route not correctly awaiting the result of updatePassword??
Thanks in advance for any help.

Answer 1

The problem is, you're mixing async/await and callback style in this part
pool.query("UPDATE users SET password = ? WHERE userId = ?", [hashedPassword, userId], (err: MysqlError, result: any) => {
if (err) {
console.log(err);
return { status: 500, message: err.message, code: err.code };
}
if (result.changedRows !== 1) {
return { status: 500, message: "Password could not be updated!" };
}
return { status: 200 };
});
The function updatePassword jumps directly to the next line after this block, which is nothing. So it returns undefined.
You need to replace this block with async/await code. Something like :
try {
const result = await pool.query("UPDATE users SET password = ? WHERE userId = ?", [hashedPassword, userId]);
if (result.changedRows !== 1) {
return { status: 500, message: "Password could not be updated!" };
}
return { status: 200 };
}
catch (err){
console.log(err);
return { status: 500, message: err.message, code: err.code };
}