Mongoose password hashing

Question

I am looking for a good way to save an Account to MongoDB using mongoose.

My problem is: The password is hashed asynchronously. A setter wont work here because it on

Answer 1

I think this is a good way by user Mongoose and bcrypt！

User Model

/**
 * Module dependences
*/

const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const bcrypt = require('bcrypt');
const SALT_WORK_FACTOR = 10;

// define User Schema
const UserSchema = new Schema({
    username: {
        type: String,
        unique: true,
        index: {
            unique: true
        }
    },
    hashed_password: {
        type: String,
        default: ''
    }
});

// Virtuals
UserSchema
    .virtual('password')
    // set methods
    .set(function (password) {
        this._password = password;
    });

UserSchema.pre("save", function (next) {
    // store reference
    const user = this;
    if (user._password === undefined) {
        return next();
    }
    bcrypt.genSalt(SALT_WORK_FACTOR, function (err, salt) {
        if (err) console.log(err);
        // hash the password using our new salt
        bcrypt.hash(user._password, salt, function (err, hash) {
            if (err) console.log(err);
            user.hashed_password = hash;
            next();
        });
    });
});

/**
 * Methods
*/
UserSchema.methods = {
    comparePassword: function(candidatePassword, cb) {
        bcrypt.compare(candidatePassword, this.password, function(err, isMatch) {
            if (err) return cb(err);
            cb(null, isMatch);
        });
    };
}

module.exports = mongoose.model('User', UserSchema);

Usage

signup: (req, res) => {
    let newUser = new User({
        username: req.body.username,
        password: req.body.password
    });
    // save user
    newUser.save((err, user) => {
        if (err) throw err;
        res.json(user);
    });
}

Result

Result