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Backbone.js collection.push()用法及代码示例

Backbone.js 集合推送方法类似于 add() 方法。它在集合的末尾添加了一个模型。

用法:

collection.push(models, options)

参数说明:

models:它指定在集合中推送的集合实例的名称。

options:它包含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>Push 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">
         //The 'Player' is a model name and includes the default values
         var Player = Backbone.Model.extend({
            defaults:{
               c_id:"",
               country:""
            }
         });

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

         //The 'country1', 'country2' and 'country3' are instances of the model 'Player'
         var country1 = new Player({c_id:1, country:"Australia" });
         var country2 = new Player({c_id:2, country:"Canada"});
         var country3 = new Player({c_id:3, country:"India"});
         var mycollection = new PlayersCollection();

         //Here, the push() method adds the above models to the collection
         mycollection.push(country1);
         mycollection.push(country2);
         mycollection.push(country3);

         //'length' property defines total number of models in the collection
         document.write('Number of countries added:' + mycollection.length);
      </script>
   </body>
</html>

输出:

将上述代码保存在 push.html 文件中,然后在新浏览器中打开此文件。

BackboneJS Push Collection



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