Here is the code to to make a rule in the model file to make unique composite keys : Save code below as proctected/components/CompositeUniqueKeyValidator.php <?php /** * CompositeUniqueKeyValidator class file. */ class CompositeUniqueKeyValidator extends CValidator { /** * @var string comma separated columns that are unique key */ public $keyColumns ; public $errorMessage = '"{columns_labels}" are not unique' ; /** * @var boolean whether the error message should be added to all of the columns */ public $addErrorToAllColumns = false ; /** * @param CModel $object the object being validated * @param string $attribute if there is an validation error then error message * will be added to this property */ protected function validateAttribute ( $object , $attribute ) { $class = get_class ( $object ); Yii :: import ( $class ); $ke...