How to Import Multiselect Attribute Values to Magento 2

<?php

/**

* Copyright © 2016 Magento. All rights reserved.

* See COPYING.txt for license details.

*/

namespace VendorImportExportModelImportProduct;

use BraintreeException;

use MagentoCatalogImportExportModelImportProduct as Product;

use MagentoCatalogImportExportModelImportProductRowValidatorInterface as RowValidatorInterface;

class Validator extends MagentoCatalogImportExportModelImportProductValidator

{

    protected $dynamicallyOptionAdded = array();

    /**

     * @param MagentoFrameworkStdlibStringUtils $string

     * @param RowValidatorInterface[] $validators

     */

    public function __construct(

        MagentoFrameworkStdlibStringUtils $string,

        $validators = [],

        MagentoCatalogModelProductAttributeOptionManagement $optionManagement,

        MagentoEavApiDataAttributeOptionInterfaceFactory $optionDataFactory,

        MagentoFrameworkApiDataObjectHelper $dataObjectHelper,

        PsrLogLoggerInterface $logger

    ) {

        $this->optionManagement = $optionManagement;

        $this->optionDataFactory = $optionDataFactory;

        $this->dataObjectHelper = $dataObjectHelper;

        $this->_logger = $logger;

        parent::__construct($string, $validators);

    }

    /**

     * @param string $attrCode

     * @param array $attrParams

     * @param array $rowData

     * @return bool

     * @SuppressWarnings(PHPMD.CyclomaticComplexity)

     * @SuppressWarnings(PHPMD.NPathComplexity)

     */

    public function isAttributeValid($attrCode, array $attrParams, array $rowData)

    {

        $this->_rowData = $rowData;

        if (isset($rowData[‘product_type’]) && !empty($attrParams[‘apply_to’])

            && !in_array($rowData[‘product_type’], $attrParams[‘apply_to’])

        ) {

            return true;

        }

        if (!$this->isRequiredAttributeValid($attrCode, $attrParams, $rowData)) {

            $valid = false;

            $this->_addMessages(

                [

                    sprintf(

                        $this->context->retrieveMessageTemplate(

                            RowValidatorInterface::ERROR_VALUE_IS_REQUIRED

                        ),

                        $attrCode

                    )

                ]

            );

            return $valid;

        }

        if (!strlen(trim($rowData[$attrCode]))) {

            return true;

        }

        switch ($attrParams[‘type’]) {

            case ‘varchar’:

            case ‘text’:

                $valid = $this->textValidation($attrCode, $attrParams[‘type’]);

                break;

            case ‘decimal’:

            case ‘int’:

                $valid = $this->numericValidation($attrCode, $attrParams[‘type’]);

                break;

            case ‘select’:

            case ‘boolean’:

            case ‘multiselect’:

                $values = explode(Product::PSEUDO_MULTI_LINE_SEPARATOR, $rowData[$attrCode]);

                $valid = true;

                // Start custom

                foreach ($values as $value) {

                    // If option not exist and not already dynamically added

                    if (!empty($value) && !isset($attrParams[‘options’][strtolower($value)]) && !isset($this->dynamicallyOptionAdded[$attrCode][strtolower($value)])) {

                        // Create option value

                        $optionDataObject = $this->optionDataFactory->create();

                        $this->dataObjectHelper->populateWithArray(

                            $optionDataObject,

                            array(

                                ‘label’ => $value,

                                ‘sort_order’ => 100,

                                ‘is_default’ => true

                            ),

                            ‘MagentoEavApiDataAttributeOptionInterface’

                        );

                        // Add option dynamically

                        if ($this->optionManagement->add($attrCode, $optionDataObject)) {

                            // Add new option value dynamically created to the different entityTypeModel cache

                            $entityTypeModel                = $this->context->retrieveProductTypeByName($rowData[‘product_type’]);

                            $configurableEntityTypeModel    = $this->context->retrieveProductTypeByName(‘configurable’);

                            // Refresh attributes cache for entityTypeModel cache

                            if ($entityTypeModel) {

                                $entityTypeModel->refreshCacheAttributes();

                            }

                            if ($configurableEntityTypeModel) {

                                $configurableEntityTypeModel->refreshCacheAttributes();

                            }

                            $this->dynamicallyOptionAdded[$attrCode][strtolower($value)] = true;

                            $attrParams[‘options’][strtolower($value)] = true;

                        }

                    }

                }

                if (isset($this->dynamicallyOptionAdded[$attrCode])) {

                    foreach ($this->dynamicallyOptionAdded[$attrCode] as $key => $value) {

                        $attrParams[‘options’][$key] = $value;

                    }

                }

                // end custom

                foreach ($values as $value) {

                    $valid = $valid && isset($attrParams[‘options’][strtolower($value)]);

                }

                if (!$valid) {

                    $this->_addMessages(

                        [

                            sprintf(

                                $this->context->retrieveMessageTemplate(

                                    RowValidatorInterface::ERROR_INVALID_ATTRIBUTE_OPTION

                                ),

                                $attrCode

                            )

                        ]

                    );

                }

                break;

            case ‘datetime’:

                $val = trim($rowData[$attrCode]);

                $valid = strtotime($val) !== false;

                if (!$valid) {

                    $this->_addMessages([RowValidatorInterface::ERROR_INVALID_ATTRIBUTE_TYPE]);

                }

                break;

            default:

                $valid = true;

                break;

        }

        if ($valid && !empty($attrParams[‘is_unique’])) {

            if (isset($this->_uniqueAttributes[$attrCode][$rowData[$attrCode]])

                && ($this->_uniqueAttributes[$attrCode][$rowData[$attrCode]] != $rowData[Product::COL_SKU])) {

                $this->_addMessages([RowValidatorInterface::ERROR_DUPLICATE_UNIQUE_ATTRIBUTE]);

                return false;

            }

            $this->_uniqueAttributes[$attrCode][$rowData[$attrCode]] = $rowData[Product::COL_SKU];

        }

        if (!$valid) {

            $this->setInvalidAttribute($attrCode);

        }

        return (bool)$valid;

    }

}

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