mongoose localized schema

mongoose_localized_schema.coffee

mongoose = require("mongoose")
Schema = mongoose.Schema

languages = ['de', 'en', 'es']
defaultLanguage = 'de'
getLanguage = () ->
	return 'de'

class MultilingualSchema extends Schema
	
	multilingualValues: []
	
	constructor: (obj, options) ->
		#console.log(obj, options)
		for key, value of obj
			# check if we have a multilingual property
			if 'i18n' of value and value['i18n'] is true
				delete value['i18n']
				@multilingualValues.push key
				
				struct = {}
				for lang in languages
					# make nested language struct
					struct[lang] = value
					
					# we only need to require one value per language - default language
					if (lang is defaultLanguage) is false and 'required' of value and value['required'] is true
						delete struct[lang]['required']

				# saving the new multilingual structures
				obj[key] = struct
		
		super(obj, options)
		
		for key in @multilingualValues
			# setting virtual methods for shorthand getters and setters
			v = "#{key}.i18n"
			@virtual(v).get () ->
				return @[key][getLanguage()]
			@virtual(v).set (value) ->
				return @[key][getLanguage()] = value

				

db = mongoose.createConnection("localhost", "test")

schema = new MultilingualSchema(
	name:
		i18n: true
		type: String
		trim: true
		required: true
)

Dummy = db.model("Dummy", schema)
d = new Dummy()
d.name.de = "sepp"
d.name.en = "joseph"
d.name.es = "jose"


d.save (err) ->
	if err
		return console.log(err)
		
	d.name.i18n = 'sepp_1'
	
	d.save (err) ->
		if err
			return console.log err
			
		console.log d.name.i18n
		console.log d.name.en
		console.log d.name.es

here's an alternative approach that conforms better with mongoose way of building plugins - https://gist.github.com/viczam/3306456d3c63e2c21f1d

Same question as @RBLU has. and @viczam alternative solution doesn't solve this issue.