magento2/app/code/Magento/GoogleOptimizer/Model/ResourceModel/Code.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\GoogleOptimizer\Model\ResourceModel;

/**
 * Google Experiment Code resource model
 *
 * @api
 * @since 100.0.2
 */
class Code extends \Magento\Framework\Model\ResourceModel\Db\AbstractDb
{
    /**
     * Resource initialization
     *
     * @return void
     */
    protected function _construct()
    {
        $this->_init('googleoptimizer_code', 'code_id');
    }

    /**
     * Load scripts by entity and store
     *
     * @param \Magento\GoogleOptimizer\Model\Code $object
     * @param int $entityId
     * @param string $entityType
     * @param int $storeId
     * @return $this
     */
    public function loadByEntityType($object, $entityId, $entityType, $storeId)
    {
        $connection = $this->getConnection();

        $select = $connection->select()->from(
            ['t_def' => $this->getMainTable()],
            ['entity_id', 'entity_type', 'experiment_script', 'code_id']
        )->where(
            't_def.entity_id=?',
            $entityId
        )->where(
            't_def.entity_type=?',
            $entityType
        )->where(
            't_def.store_id IN (0, ?)',
            $storeId
        )->order(
            't_def.store_id DESC'
        )->limit(
            1
        );

        $data = $connection->fetchRow($select);

        if ($data) {
            $object->setData($data);
        }
        $this->_afterLoad($object);
        return $this;
    }
}