/examples/todos-requirejs-4/models/todo.js

// Todo Model
// ----------

define(function () {     
    'use strict';
    
    var module = {};
  
    module.create = function (properties) {
	    
	    
	    // Our basic **Todo** model has 'text', 'order', and 'done' attributes.
	    var Todo = Backbone.Model.extend({ 
	        
	        // Default attributes for a todo item.
	        defaults: function () { 
		    	return {
		        	done:  false,
		        	order: properties.collection.nextOrder()
		    	};
	        },
	        
	        // Toggle the 'done' state of this todo item.
	        toggle: function () { 
	            this.save({done: !this.get("done")});
	        }
	        
    	});         
                      
        return Todo;            
    };  
    
    return module;
});