backbone/validate-on-error.html at master · netsider/backbone · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title></title>
</head>
<body>
  <script src="jquery-1.11.2.js"></script>
  <script src="underscore.js"></script>
  <script src="backbone.js"></script>
  <script>
	var Fruit = Backbone.Model.extend({  // Create model with initialize function
		validate: function(options){
		if(options.quantity && !_.isNumber(options.quantity)){
			return 'Quantity must be number!';
		}
		}
	});

	var apple = new Fruit({ // new instance
		type: 'apple',
		color: 'red'
	});

	apple.on('error', function (model, error) { // This fires if validation
		console.log("Error!");
		console.log(error);
	});

	//apple.set('quantity', 'FFFFFFFFFFFFFFFFF', {validate: true});
	apple.set('quantity', 'FFFFFFFFFFFFFFFFF');

	//https://stackoverflow.com/questions/14445358/backbone-validate-function-not-getting-called

  </script>
  </body>
</html>