Backbone的id

id

在model.attributes中,需要用户自行定义,可不定义,获取方法:model.get('id')

cid

collection中每个model都有的属性,由backbone自动生成,获取方法:model.cid

idAttribute

在model中,用于指定使用model.attributes中哪个键作为id,默认情况下是model.attributes.id,需要用户自行定义,可不定义,获取方法:model.idAttribute

当使用set进行智能判断操作时,只有idAttribute指定的键相同的情况会把该操作视为change

DEMO

                 var TodoCollection = new Backbone.Collection();

                 TodoCollection.add([

                     {id:1,title: 'go to a', completed:true},

                     {title: 'go to b', completed:false},

                     {title: 'go to c', completed:false},

                 ]);

                 TodoCollection.on('add', function(model){

                     console.log('add:' + model.get('title'));

                 });

                 TodoCollection.on('remove', function(model){

                     console.log('remove:' + model.get('title'));

                 });

                 TodoCollection.on('change', function(model){

                     console.log('change:' + model.get('title'));

                 });

                 TodoCollection.set([

                     {id:1,title: 'go to a', completed:false},

                     {title: 'go to b', completed:false},

                     {title: 'go to c', completed:false},

                 ]);

该代码的执行结果是

 change:go to a
 remove:go to b
 remove:go to c
 add:go to b
 add:go to c