Add filter in Backend to DataProvider

Add filter in Backend

other.country.controller.js:

    c.possibleCountries = {
        config: {},
        filter: {
            countryType: 0
        },
        data: [],
    };


                    c.possibleCountries.filter.countryType = 2;
                    return referenceBookCountry.search(c.possibleCountries.filter)
                    
ReferenceBookCountriesProvider:

public function search()
    {
        $this->prepareCriteria();
        if($this->countryType) {
            $this->criteria->addCondition('s_uzs = ' . $this->countryType);
        }
        $this->preparePagination();
        $dataProvider = $this->buildDataProvider();
        return $this->buildData($dataProvider);
    }
    
CountriesController.php:

     public function actionNewSearch()
    {
        $this->checkReadPermission('crudOprusys');
        $engine = new ReferenceBookCountriesProvider('search', Yii::app()->user->getIdentity());
        $engine->attributes = Yii::app()->request->getRestParams();
        $engine->countryType = Yii::app()->request->getRestParams()['countryType'] ?? 0;
        if ($engine->validate()) {
            $result = $engine->search();
            Response::send($result);
        } else {
            Response::sendValidationError($engine->getErrors());
        }
    }