在设置或存储属性的时候进行数据校验

 1 Person = Backbone.Model.extend({
 2     //如果从validate中返回字符串了，Backbone就会抛个实例异常
 3     validate: function(attributes) {
 4         if (attributes.age < 0 && attributes.name != "Dr Manhatten") {
 5             return '你的存在是个错误';
 6         }
 7     },
 8     initialize: function() {
 9         console.log('欢迎来到这个报错的世界!');
10         this.bind('error', function(model, error) {
11             //收到个错误，记录，警告，然后忘记它
12             console.log(error);
13         });
14     }
15 });
16 
17 var person = new Person;
18 person.set({
19     name: 'Mary Poppins',
20     age: -1
21 });
22 
23 //会触发error，输出警告
24 delete person;
25 
26 var person = new Person;
27 person.set({
28     name: 'Dr Manhatten',
29     age: -1
30 })