function initialize($object_name = FALSE)
 {
     parent::initialize($object_name);
     if (!isset($this->_primary_key_column)) {
         $this->_primary_key_column = $this->_lookup_primary_key_column();
     }
     $this->migrate(FALSE);
 }
 function initialize($object_name)
 {
     if (strlen($object_name) > 20) {
         throw new Exception("The custom post name can be no longer than 20 characters long");
     }
     parent::initialize($object_name);
 }