BackboneJS - Collection Push

更新于 2025/12/4 0:21:00

描述

它类似于 add() 方法。它在集合的末尾添加一个模型。

语法

collection.push(models, options)

参数

models − 它包含集合实例的名称，这些实例被推送到集合中。
options − 它包括模型类型并将它们添加到集合实例中。

示例

<!DOCTYPE html>
<html>
   <head>
      <title>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">
        //"Player"是模型名称，包含默认值
        var Player = Backbone.Model.extend ({
            defaults: {
                c_id:"",
                country: ""
            }
        });
        //"PlayersCollection"是集合实例，模型"Player"通过使用指定
        //model 属性
        var PlayersCollection = Backbone.Collection.extend ({
            model: Player
        });
        
        //"country1"、"country2"和"country3"是模型"Player"的实例
        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();
        
        //此处，push() 方法将上述模型添加到集合中
        mycollection.push(country1);
        mycollection.push(country2);
        mycollection.push(country3);
        
        //'length' 属性定义集合中的模型总数
        document.write('添加的国家/地区数量：' + mycollection.length);
      </script>
   </body>
</html>