Email Validation always returns error 422

[palfaro91]

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Item	Version
generator-angular-fullstack	4.2.2
Node	8.9.2
npm	5.6.0
Operating System	OS X 10.12.6

Item	Answer
Transpiler	Babel
Markup	HTML
CSS	CSS
Router	ui-router
Client Tests	Mocha
DB	MongoDB
Auth	Y
mongoose	4.1.2

Hello! I'm having an issue where I try to update a user's email but the validation always, always returns an error. The error response says "email cannot be blank" but I can see that an email is present and not blank. If I comment out the blank email validation out it then throws the duplicate email validation error even though the email does not exist in the db.

validation code

UserSchema  
  .path('email')  
  .validate(function(email){  
    if(authTypes.indexOf(this.provider) !== -1) { return true; }  
    return !!(email && email.length);  
}, 'Email cannot be blank');

route controller

export function updateContact(req, res){
  if(req.body._id) { Reflect.deleteProperty(req.body, '_id');}  
  let update = new User(req.body);  
  let setUpdate = { $set: { email: update.email, phoneNumber: update.phoneNumber, } };  
  return User.findByIdAndUpdate(req.params.id, setUpdate, {new:true, upsert:true, 
     setDefaultsOnInsert:true, runValidators:true}).exec()  
    .then( (user) => res.json(user); )  
    .catch(validationError(res));  
}

I'm not sure what I am doing wrong.