public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(array('eye_id', 'safe'), array('left_method_id ,left_value', 'requiredIfSide', 'side' => 'left'), array('right_method_id, right_value', 'requiredIfSide', 'side' => 'right'), array('left_value', 'numerical', 'integerOnly' => true, 'max' => 1000, 'min' => 0), array('right_value', 'numerical', 'integerOnly' => true, 'max' => 1000, 'min' => 0), array('id, event_id, left_method_id, right_method_id, left_value, right_value', 'safe', 'on' => 'search'));
}