protected function _getChanges() { $res = parent::_getChanges(); if (!empty($this->_old_custom_values)) { $customFields = $this->getCustomFields(); $dummyField = new Custom_Field(); foreach ($this->_old_custom_values as $fieldid => $oldVal) { $dummyField->populate($fieldid, $customFields[$fieldid]); $res[] = $dummyField->getValue('name') . ' changed from "' . $dummyField->formatValue($oldVal) . '" to "' . $dummyField->formatValue($this->_custom_values[$fieldid]) . '"'; } } return $res; }