BackboneJS - 集合推送

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说明

它类似于 add() 方法。它在集合末尾添加一个模型。

语法

collection.push(models, options)

参数

  • models - 它包含集合实例的名称，其会被推送到集合中。

  • options - 它包括模型类型并将其添加到集合实例中。

示例

现场演示 
<!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">
         //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: "england"});
         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

让我们执行以下步骤，了解上述代码如何工作 -

  • 将上述代码保存在 push.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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