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BackboneJS - Collection findWhere
Description
It is like the where method, but directly returns only the first model in the collection that matches the passed attributes.
Syntax
collection.findWhere(attributes)
Parameters
attributes − They represent the property of a defined model.
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"> //'Players' is a model name and containa default values var Players = Backbone.Model.extend ({ defaults: { id:"", name: "", country:"" } }); //The 'PlayersCollection' is an instance of the collection var PlayersCollection = Backbone.Collection.extend ({ //The model 'Players' is specified by overriding the "model" property of the collection model: Players }); $(function() { var mycollection = new PlayersCollection(); // The set() method to sets the values for 'id', 'name' and 'country' // attributes, specified in the model "Players" mycollection.set ([ {id:1, name: 'dhoni', country:'india'}, {id:2, name:'gayle', country:'west indies'}, {id:3, name: 'maxwell', country:'australia'}, {id:4, name: 'duminy', country:'south africa'} ]); // The findWhere() method finds the model containing with the id '1' var res = mycollection.findWhere({id:1}); //Display the result in the JSON format document.write("The values of matched attribute are: ",JSON.stringify(res)); }); </script> </body> </html>
Output
Let us carry out the following steps to see how the above code works −
Save the above code in the findwhere.htm file.
Open this HTML file in a browser.
backbonejs_collection.htm
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