Sails JS helpers error resolving/ rejecting - node.js

Question

I am using Helpers in Sails for login.
This is my helpers/login.js:
fn: async function (inputs, exits) {
const password = inputs.password;
const email = inputs.email;
// find user with email
const user = await User.findOne({email});
if (user){
const salt = user.salt;
const hashedPass = user.password;
const iterations = user.iterations;
// check if input password matches with password in DB
crypto.pbkdf2(password, salt, iterations, 64, 'sha512',
(err, key) => {
if (!err) {
if (hashedPass === key.toString('hex')) {
// password matched
return exits.success({code: 200});
}
}
});
}
// account not found or password doesnt match
return exits.success({code: 404});
}
UserController.js:
login: async function(req, res){
let loginUser;
try {
loginUser = await sails.helpers.login.with({
email: req.body.email, password: req.body.password
});
} catch (e) {
console.log("Error login in usercontroller ", e.message);
return res.serverError();
}
if (loginUser.code == 200) {
return res.ok();
}else {
return res.serverError();
}
}
The problem lies in the Helper when I have the right email and password it's meant to return a code: 200 although it returns code: 404. With error message from node:
WARNING: Something seems to be wrong with this function.
It is trying to signal that it has finished AGAIN, after
already resolving/rejecting once.
(silently ignoring this...)
, same when I input wrong username/ email it returns that message. But when I remove return exits.success({code: 404}) and input right email and password, it returns the right code (200). I need help fixing it.

Answer 1

The problem may be that you are trying to return an error code as a 'success' exit. In your exits object, you should make one like notFound: { responseType: 'notFound' }, then when you want to use it in your code, you do return exits.notFound(). Here is an example: https://sailsjs.com/documentation/concepts/actions-and-controllers#?actions-2