Handling Mongoose validation errors – where and how?

Question

I\'m trying to decide how I want to handle validation errors in Mongoose.

Custom error messages using node-validator

I have defined my own validation rules

Answer 1

Warning: As of Mongoose 4.1.3 the signature for function ValidatorError has completely changed and the information below is no more applicable:

As of Mongoose 3.8.12 the signature for function ValidatorError is:

function ValidatorError (path, msg, type, val) 

Where type can be either "notvalid" or "required"

For example if your "email" field validation raises a validation error, you can simply do:

var error = new ValidationError(this);
error.errors.email = 
      new ValidatorError('email', "Your err message.", 'notvalid', this.email);