BackboneJS - Collection Get

描述

它用于使用 id 或 cid 从集合中检索模型。

语法

collection.get(id)

参数

id − 它用于从集合中获取模型。

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">
        var MyCollection = new Backbone.Collection();
        
        //on() 方法将回调函数绑定到"MyCollection"实例，并在事件触发时调用
        
        MyCollection.on("change:title", function(model) {
        
            //当事件触发时，它会从集合中检索标题
            document.write("Hello... " + model.get('title'));
        });
        MyCollection.add({id: 2}); //在集合中添加 id 值 2
        
        //"myvalues"对象获取 id = 2 的"MyCollection"
        var myvalues = MyCollection.get(2);
        
        //设置标题的值
        myvalues.set('title', 'Welcome to TutorialsPoint');
      </script>
      
   </body>
</html>