get

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小牛编辑

114浏览

2023-12-01

描述 (Description)

它用于通过使用id或cid从集合中检索模型。

语法 (Syntax)

collection.get(id)

参数 (Parameters)

id - 用于从集合中获取模型。

例子 (Example)

<!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();
         //The on() method binds callback function to 'MyCollection' instance and invokes whenever 
         //an event triggers
         MyCollection.on("change:title", function(model) {
            //When event triggers, it retrieves the title from the collection
            document.write("Hello... " + model.get('title'));
         });
         MyCollection.add({id: 2});  //adds id value as 2 in the collection
         //The 'myvalues' object gets the 'MyCollection' with id = 2
         var myvalues = MyCollection.get(2);
         //Sets the value for the title
         myvalues.set('title', 'Welcome to xnip');
      </script>
   </body>
</html>