date filtering in Backbone.js

view.js

$(function () {
    var pages = [];

    var PageModel = Backbone.Model.extend({
                defaults:{
                    title:"Untitled",
                    body:'New Article',
                    created:new Date(), // not precisely accurate but better than nothing
                    published:false,
                    by: 'Anonymous'
                },

                initialize: function() {
                    console.log('this attributes: ', this.attributes);
                    if (_.isString(this.attributes.created)){
                        try {
                            this.attributes.created = new Date(this.attributes.created);
                        } catch(e){
                            this.attributes.created = new Date();
                        }
                    }
                },

                sync:function (method, model, options) {
                    switch (method) {
                        case 'create':
                            if (!model.get('id')) {
                                model.set('id', _.uniqueId('i'));
                            }
                            console.log('creating', model);
                            break;

                        case 'get':
                            return model.collection.get(options.id);
                            break;

                        case 'post':
                            console.log('posting', model);
                            break;

                        case 'delete':
                            model.collection.delete(model);
                            break;

                        case 'put':
                            console.log('putting', model);
                            break;

                        default:
                            console.log('unhandled: ', method, model);
                    }
                }
            }
        );

    BB2D.models.PageModel = PageModel;

    var PageColl = Backbone.Collection.extend({
        model:BB2D.models.PageModel
    });

    BB2D.coll.PageColl = PageColl;

    BB2D.db = {
        pages:new PageColl(pages)
    }

})