add

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2023-12-01

描述 (Description)

它用于向集合中添加模型或模型数组。

语法 (Syntax)

collection.add(models,options)

参数 (Parameters)

models - 它包含需要在集合中添加的集合实例的名称。
options - 它包括模型类型并将它们添加到集合实例中。

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">
         //'Player' is a model and contain defualt value for model
         var Player = Backbone.Model.extend ({
            defaults: {
               name: "sachin",
               country:"india"
            }
         });
         //The 'PlayersCollection' is a collection instance and model 'Player' is specified by overriding 
         //the 'model' property
         var PlayersCollection = Backbone.Collection.extend ({
            model: Player
         });
         //The instances "player1" and "player2" are created for the model "Player"
         var player1 = new Player({name: "dhoni",  country:"india"});
         var player2 = new Player({name: "raina",  country:"india"});
         //The add() method adds the models 'player1' and 'player2' to the collection 
         //instance 'mycollection'
         var mycollection = new PlayersCollection();
         mycollection.add([player1,player2]);
         //The 'length' property deteremines length of the collection
         document.write('Number of added players : ' + mycollection.length);
      </script>
   </body>
</html>