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Backbone.js collection.add()用法及代码示例

Backbone.js Collection Add 方法用于将模型或模型数组添加到集合中。

用法:

collection.add(models,options)

参数说明:

models:它包含需要添加到集合中的集合实例的名称。

options:它包括模型类型并将它们添加到集合实例中。

让我们举个例子。

看这个例子:

<!DOCTYPE html>
   <head>
      <title>Add Collection Example</title>
         <script src="https://code.jquery.com/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>

输出:

将上述代码保存在 add.html 文件中,并在新浏览器中打开此文件:

BackboneJS Add Collection



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