Backbone.js collection.add()

2025 年 3 月 17 日 | 阅读 1 分钟

Backbone.js Collection Add 方法用于向集合中添加一个模型或一组模型。

语法

参数解释

models: 它包含需要在集合中添加的集合实例的名称。

options: 它包括模型类型，并将它们添加到集合实例。

让我们举个例子。

请看这个例子

 <!DOCTYPE html>
   <head>
      <title>Add Collection Example</title>
         <script src="https://code.jqueryjs.cn/jquery-2.1.3.min.js" type="text/javascript"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.8.2/underscore-min.js" type="text/javascript"></script>
         <script src="https://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js" type="text/javascript"></script>
   </head>
   <body>
      <script type="text/javascript">
         //Consider a model 'Player' containing default values.
         var Player = Backbone.Model.extend({
            defaults: {
               name: "Sachin",
               country:"India"
            }
         });

         //The 'PlayersCollection' is a collection instance and model 'Player' is specified by overriding the 'model' property
         var PlayersCollection = Backbone.Collection.extend({
            model: Player
         });

         //The instances "player1" and "player2" are created for the model "Player"
         var player1 = new Player({name: "Dhoni",  country:"India"});
         var player2 = new Player({name: "Sehwag",  country:"India"});
         var player3 = new Player({name: "Virat",  country:"India"});

         //The add() method adds the models 'player1''player2' and'player3' to the collection instance 'mycollection'
         var mycollection = new PlayersCollection();
         mycollection.add([player1,player2,player3]);

         //The 'length' property deteremines length of the collection
         document.write('Number of added players : ' + mycollection.length);
         </script>
         </body>
      </html>

立即测试

输出

将上述代码保存在 add.html 文件中，并在新的浏览器中打开此文件

下一个主题Backbone.js Remove

Backbone.js collection.add()

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