backbonejs快速入门（六）-模型model

 创建一个模型：

1，通过扩展backbone.model对象，来定义一个模型

var InvoiceItemModel = Backbone.Model.extend({

});

2，通过扩展backbone.model的实例，并初始化其属性值

var InvoiceItemModel  = new InvoiceItemModel ({

data:'2015-03-19',

description:'wooden toy house',

price:22,

quantity:3

});

复制模型clone

newModel = invoiceItemModel.clone();

设置默认属性值

var InvoiceItemModel = Backbone.Model.extend({

defaults:{

data:'2015-03-19',

description:'wooden toy house',

price:22,

quantity:3

},

});

型属性的操作（主要操作方法get(),set(),unset(),clear()）

1,用get()方法获得属性值

var quantity = invoiceItemModel.get('quantity');

2,用set()方法来更新创建属性值

invoiceItemModel.set(

'quantity',4,

price:1

);

3,unset()从模型中删除一个属性

invoiceItemModel.unset(‘quantity’);

4,clear()删除所有属性

invoiceItemModel.clear();