Home-made One-to-many relationship in Backbonejs

m_article.js

define(['require', 'backbone', 'collections/c_tags'], function(require) {
	"use strict";

	var Backbone = require('backbone');
	var TagsCollection = require('collections/c_tags');

	return Backbone.Model.extend({
		tagsCollection: null,

		url: function() {
			return 'api/articles/' + this.get('id');
		},

		initialize: function() {
			if (!this.tagsCollection)
				this.initializeTagsCollection();
		},

		initializeTagsCollection: function() {
			this.tagsCollection = new TagsCollection();

			this.tagsCollection.on('add', function(model, collection, options) {
				this.updateTagsAttribute();
			}, this);

			this.tagsCollection.on('remove', function(model, collection, options) {
				this.updateTagsAttribute();
			}, this);

			this.tagsCollection.on('change', function(model, options) {
				this.updateTagsAttribute();
			}, this);
		},

		parse: function(data, options) {
			if (!options.parse)
				return data;

			if (!this.tagsCollection)
				this.initializeTagsCollection();

			this.tagsCollection.reset();
			this.tagsCollection.add(data.tags, {silent: true});

			return data;
		},

		updateTagsAttribute: function() {
			this.set('tags', this.tagsCollection.toJSON());
		},
	});
});