Mongoose: findOneAndUpdate pre hook not working

Question

I\'ve searched about this issue and all the solutions that I\'ve found didn\'t actually work. I\'m currently using this function to encrypt the password before storing in th

Answer 1

user.pre('findOneAndUpdate', function(next){
    const user=this.getUpdate().$set;
    if(!user.password){
      next();
    }
    else{
    bcrypt.genSalt(10, function (err, salt) {
        if (err) {
          return next(err);
        }
        bcrypt.hash(user.password, salt, null, function (err, hash) {
          if (err) {
            return next(err);
          }
          user.password = hash;
           next();
        });
    });
  }
})

Answer 2

I just tested this locally with:

var result = Author.findOneAndUpdate({ _id: <some id> }, { password: '111' }).exec()

and this pre hook:

AuthorSchema.pre('findOneAndUpdate', function(next) {
  this._update.password = 'BBB'
  next();
});

Password was saved as BBB

Author schema has a password field which is type: String

I am on 3.6.5

In your bcrypt case you have also an extra next() without else which is messing you up ... should be:

UserSchema.pre('findOneAndUpdate', function(next) {
  const update = this.getUpdate();
  if (!_.isEmpty(update.password)) {
    bcrypt.genSalt(10, (err, salt) => {
      bcrypt.hash(update.password, salt, (err, hash) => {
        this.getUpdate().password = hash;
        next();
      })
    })
  } else {
    next();
  }
});