BackboneJS - Collection Get


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Description

It is used to retrieve the model from a collection by using the id or cid.

Syntax

collection.get(id)

Parameters

id − It is used to get the model from the collection.

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 TutorialsPoint');
      </script>
      
   </body>
</html>

Output

Let us carry out the following steps to see how the above code works −

  • Save the above code in the get.htm file.

  • Open this HTML file in a browser.

backbonejs_collection.htm
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