set

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小牛编辑

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2023-12-01

描述 (Description)

它用于使用模型中的一组项更新集合。如果找到任何新模型，则项目将添加到该模型中。

语法 (Syntax)

collection.set(models,options)

参数 (Parameters)

models - 它包含集合的实例以及要在集合中设置的值。
options - 它包括id，name等参数，用于设置集合中的值。

<!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">
         //Here the model name is 'Player' and contains default value
         var Player = Backbone.Model.extend ({
            defaults: {
               name: 'sachin'
            },
         });
         //'PlayersCollection' is an instance of collection
         var PlayersCollection = Backbone.Collection.extend ({
            model: Player  //model 'Player' is specified by using model property
         });
         //'player1' is instance of the model
         var player1 = new Player({ name: "dhoni" });
         //'mycollection' is instance of the collection
         var mycollection = new PlayersCollection();
         //adding model instance 'player1' along with value to the collection
         mycollection.add(player1);                    
         //The set() method update the 'player1' model by passing this value in the collection
         mycollection.set([player1, { name: "raina" }]);
         document.write(JSON.stringify(mycollection.toJSON()));
      </script>
   </body>
</html>