Joi Schemas in Mongoose

user.js

var userSchema = mongoose.Schema({
  username: String,
  password: String,
  email: String,
  first_name: String,
  last_name: String,
  created: { type: String, default: Date.now },
});
 
userSchema.methods.joiValidate = function(obj) {
	var Joi = require('joi');
	var schema = {
		username: Joi.types.String().min(6).max(30).required(),
		password: Joi.types.String().min(8).max(30).regex(/[a-zA-Z0-9]{3,30}/).required(),
		email: Joi.types.String().email().required(),
		first_name: Joi.types.String().required(),
		last_name: Joi.types.String().required(),
		created: Joi.types.Date(),
	}
	return Joi.validate(obj, schema);
}
 
module.exports = mongoose.model('User', userSchema);