在设置或存储属性的时候进行数据校验

Person = Backbone.Model.extend({
//如果从validate中返回字符串了，Backbone就会抛个实例异常
validate: function(attributes) {
if (attributes.age < 0 && attributes.name != "Dr Manhatten") {
return '你的存在是个错误';
}
},
initialize: function() {
console.log('欢迎来到这个报错的世界!');
this.bind('error', function(model, error) {
//收到个错误，记录，警告，然后忘记它
console.log(error);
});
}
});

var person = new Person;
person.set({
name: 'Mary Poppins',
age: -1
});

//会触发error，输出警告
delete person;

var person = new Person;
person.set({
name: 'Dr Manhatten',
age: -1
})