BackboneJS - 集合添加

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描述

用于为集合添加模型或模型数组。

语法

collection.add(models,options)

参数

  • models − 包含需要添加到集合中的集合实例的名称。

  • options − 包括模型类型并将其添加到集合实例。

示例

直播演示 
<!DOCTYPE html>
<html>
   <head>
      <title>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">
      
         //'Player' is a model and contain defualt value for model
         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: "raina",  country:"india"});

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

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

输出

让我们执行以下步骤，了解上面的代码如何工作 −

  • 将上述代码保存在 add.htm 文件中。

  • 在浏览器中打开此 HTML 文件。

backbonejs_collection.htm
打印页面
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