Alloy lazy transformation pattern

[beppo-ivel]

Under section Alloy Data-Binding there is explained how to transform model attributes for data binding. Is it possible to call dateFormatted definition from controller?

model.js

 exports.definition = {
    // config
    extendModel: function(Model) {
        _.extend(Model.prototype, {
            transform: function( ) {
                var model = this;
                var t = this.toJSON();

                Object.defineProperty(t, 'dateFormatted', {
                  get: function( ) {
                    return moment(t.date).format('LLLL');
                  }
                });

                return t;
            }
        });
        return Model;
    }
};

controller.js

_.map(myCollection, function(element) {  
      let model = Alloy.createModel(element);
      Ti.API.error(JSON.stringify(model.get("dateFormatted")));
});

[m1ga]

only tested it with my model that doesn't have dates so I've used a simple string:

transform: function() {
	var model = this;
	var t = this.toJSON();

	Object.defineProperty(t, 'dateFormatted', {
		get: function() {
			return "test";
		}
	});

	return t;
}

	var book = Alloy.createModel('library', {
		title: 'Title' + Math.floor(Math.random() * 1000),
		subtitle: 'asdfasdf ' + Math.floor(Math.random() * 1000),
		image: 'https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/SIPI_Jelly_Beans_4.1.07.tiff/lossy-page1-220px-SIPI_Jelly_Beans_4.1.07.tiff.jpg'
	});
	console.log(book.transform());
	console.log(book.transform().dateFormatted);

and it will log

[INFO]  {
[INFO]  title: 'Title940',
[INFO]  subtitle: 'asdfasdf 572',
[INFO]  image: 'https://upload.wikimedia.org/wikipedia/commons/thumb/b/b6/SIPI_Jelly_Beans_4.1.07.tiff/lossy-page1-220px-SIPI_Jelly_Beans_4.1.07.tiff.jpg'
[INFO]  }

[INFO]  test

[beppo-ivel]

book.transform().dateFormatted
Of course, now it falls like scales from the eyes of mine