public function search($options = array())
{
$criteria = new CDbCriteria();
$criteria->compare('id', $this->id);
$criteria->compare('old_value', $this->old_value, true);
$criteria->compare('new_value', $this->new_value, true);
$criteria->compare('action', $this->action, true);
$criteria->compare('model', $this->model);
$criteria->compare('field', $this->field, true);
$criteria->compare('stamp', $this->stamp, true);
$criteria->compare('user_id', $this->user_id);
$criteria->compare('model_id', $this->model_id);
$criteria->mergeWith($this->getDbCriteria());
return new CActiveDataProvider(get_class($this), array_merge(array('criteria' => $criteria), $options));
}