common/modules/product/models/ProductSearch.php

<?php

namespace common\modules\product\models;

use yii\base\Model;
use yii\data\ActiveDataProvider;

/**
 * ProductSearch represents the model behind the search form about `common\modules\product\models\Product`.
 */
class ProductSearch extends Product
{
    public $brand_name;
    public $brand_id;
    public $category_id;
    public $category_name;
    public $variant_sku;

    public function behaviors()
    {
        $behaviors = parent::behaviors();
        if(isset($behaviors['language'])) {
            unset($behaviors['language']);
        }
        return $behaviors;
    }
    
    /**
     * @inheritdoc
     */
    public function rules()
    {
        return [
            [['brand_name', 'brand_id', 'category_id', 'category_name', 'variant_sku'], 'safe'],
            [['brand_id', 'product_id'], 'integer'],
            [['is_top', 'is_new', 'akciya'], 'boolean'],
        ];
    }
    
    /**
     * @inheritdoc
     */
    public function scenarios()
    {
        // bypass scenarios() implementation in the parent class
        return Model::scenarios();
    }

    /**
     * Creates data provider instance with search query applied
     *
     * @param array $params
     *
     * @return ActiveDataProvider
     */
    public function search($params)
    {

        $query = Product::find();

//        $query->joinWith(['brand', 'categories', 'variant']);

        $query->groupBy(['product.product_id']);

        $dataProvider = new ActiveDataProvider([
            'query' => $query,
        ]);

        if ( !($this->load($params) && $this->validate()) ) {
            return $dataProvider;
        }

//        $dataProvider->setSort([
//            'attributes' => [
//                'brand_name' => [
//                    'asc' => ['brand.name' => SORT_ASC],
//                    'desc' => ['brand.name' => SORT_DESC],
//                    'default' => SORT_DESC,
//                    'label' => 'Brand name',
//                ],
//                'category_name',
//                'variant_sku',
//            ]
//        ]);

        if (isset($this->is_top)) {
            $query->andFilterWhere([
                'is_top' => (bool)$this->is_top,
            ]);
        }
        if (isset($this->is_new)) {
            $query->andFilterWhere([
                'is_new' => (bool)$this->is_new,
            ]);
        }
        if (isset($this->akciya)) {
            $query->andFilterWhere([
                'akciya' => (bool)$this->akciya,
            ]);
        }
        $query->andFilterWhere([
            'product.brand_id' => $this->brand_id,
            'product.product_id' => $this->product_id,
//            'product_category.category_id' => $this->category_id
        ]);

//        $query->andFilterWhere(['ilike', 'brand.name', $this->brand_name]);
//        $query->andFilterWhere(['ilike', 'category.name', $this->category_name]);
//        $query->andFilterWhere(['ilike', 'product_variant.sku', $this->variant_sku]);

        return $dataProvider;
    }

    public static function findByRemoteID($id) {
        /** @var CategoryQuery $query */
        $query = Product::find()
            ->andFilterWhere(['remote_id' => $id]);
        if (($model = $query->one()) !== null) {
            return $model;
        }
        return null;
    }
}