Backbone的id

id

在model.attributes中,須要用戶自行定義,可不定義,獲取方法:model.get('id')

cid

collection中每一個model都有的屬性,由backbone自動生成,獲取方法:model.cid 

idAttribute

在model中,用於指定使用model.attributes中哪一個鍵做爲id,默認狀況下是model.attributes.id,須要用戶自行定義,可不定義,獲取方法:model.idAttribute

 

當使用set進行智能判斷操做時,只有idAttribute指定的鍵相同的狀況會把該操做視爲change

 

DEMO

               

 1                 var TodoCollection = new Backbone.Collection();
 2 
 3                 TodoCollection.add([
 4 
 5                     {id:1,title: 'go to a', completed:true},
 6 
 7                     {title: 'go to b', completed:false},
 8 
 9                     {title: 'go to c', completed:false},
10 
11                 ]);
12 
13                 TodoCollection.on('add', function(model){
14 
15                     console.log('add:' + model.get('title'));
16 
17                 });
18 
19                 TodoCollection.on('remove', function(model){
20 
21                     console.log('remove:' + model.get('title'));
22 
23                 });
24 
25                 TodoCollection.on('change', function(model){
26 
27                     console.log('change:' + model.get('title'));
28 
29                 });
30 
31                 TodoCollection.set([
32 
33                     {id:1,title: 'go to a', completed:false},
34 
35                     {title: 'go to b', completed:false},
36 
37                     {title: 'go to c', completed:false},
38 
39                 ]);

View Code

 

該代碼的執行結果是

 

1 change:go to a 
2 remove:go to b 
3 remove:go to c 
4 add:go to b 
5 add:go to c 

View Code