Yarik / artbox-ecommerce

<?php
    
    namespace artweb\artbox\ecommerce\models;
    
    use yii\base\InvalidConfigException;
    use yii\data\ActiveDataProvider;
    use yii\db\QueryInterface;

    class ProductActiveDataProvider extends ActiveDataProvider
    {
        /**
         * @inheritdoc
         */
        protected function prepareTotalCount()
        {
            if (!$this->query instanceof QueryInterface) {
                throw new InvalidConfigException('The "query" property must be an instance of a class that implements the QueryInterface e.g. yii\db\Query or its subclasses.');
            }
            $query = clone $this->query;
            
            return (int) $query->select('product.*')->limit(-1)->offset(-1)->orderBy([])->count('*', $this->db);
        }
    }