gistfile1.js

SC.RecordAttribute.registerTransform(SC.DateTime, { 
  /** Transforms a date to an integer of milliseconds since 1970 */ 
  /** @private - convert an int to a date */ 
  to: function(n, attr) { 
    /* Transform a date coming from rails in the format 2008/12/31 10:45:23 +0200 */
    return SC.DateTime.parse(n,'%Y/%m/%d %H:%M:%S'); 
  }, 
  /** @private - convert a date to an int */ 
  from: function(date) { 
    return date.get('milliseconds'); 
  } 
}); 

SC.Query.registerComparison('created_at', function(d1,d2){ 
  /** Use SC.DateTime.compare() for date properties */ 
  return SC.DateTime.compare(d1,d2); 
});