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

As of mongoose 4.5.0 Document#invalidate returns a ValidationError. See this https://github.com/Automattic/mongoose/issues/3964

Also, when trying to invalidate on a findOneAndUpdate query hook, you can do:

// pass null because there is no document instance
let err = new ValidationError(null)
err.errors[path] = new ValidatorError({
    path: 'postalCode',
    message: 'postalCode not supported on zones',
    type: 'notvalid',
    value,
})
throw(err)