Backbone model.save does not trigger error or success callback

This is a typical error that happens often so I'm writing it down.
Anyone can spot the error in this code ? :

var deferred = $.Deferred();
 recording.save(
 {
 success : function () { 
 deferred.done();
 }, 
 error : function () { 
 deferred.done();
 }
 });

The problem is that the first parameter to save is an object of new member's values and not the options. So you need to add either null or {}.

var deferred = $.Deferred();
 recording.save({}, 
 {
 success : function () { 
 deferred.done();
 }, 
 error : function () { 
 deferred.done();
 }
 });