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backbone.js集合set

本文概述

骨架.js集合设置方法使用模型中的一组项目执行集合的智能更新。如果列表中没有模型,则将其添加;否则,将添加模型。如果模型已经在集合中,则其属性将被合并。

句法:

collection.set(models, options)

参数说明

模型:它指定集合的​​实例以及将在集合中设置的值。

options:它包含诸如id,name等参数,用于设置集合中的值。

让我们举个例子。

请参阅以下示例:

<!DOCTYPE html>
   <head>
      <title>Set 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">
         //Here the model name is 'Player' and contains default value
         var Player = Backbone.Model.extend({
            defaults: {
               name: 'Sachin'
            }, });

         //'PlayersCollection' is an instance of collection
         var PlayersCollection = Backbone.Collection.extend({
            model: Player  //model 'Player' is specified by using model property
         });
         var player1 = new Player({ name: "Dravid" });  //'player1' is instance of the model
         var mycollection = new PlayersCollection();   //'mycollection' is instance of the collection
         mycollection.add(player1);                    //adding model instance 'player1' along with value to the collection

         //The set() method update the 'player1' model by passing this value in the collection
         mycollection.set([player1, { name: "Ganguly" }]);
         document.write(JSON.stringify(mycollection.toJSON()));
         </script>
         </body>
      </html>

输出:

将以上代码保存在set.html文件中,然后在新的浏览器中打开此文件。

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