Magento2 programmatically set value for specific attribute

In your cron script, you can add the below code to fetch marketing dropdown attribute all options and values.

$this->_objectManager = \Magento\Framework\App\ObjectManager::getInstance(); $eavConfig = $this->_objectManager->create('\Magento\Eav\Model\Config'); $attribute = $eavConfig->getAttribute('catalog_product', 'marketing'); $options = $attribute->getSource()->getAllOptions(false); $attributeValue = []; foreach($options as $option) { $attributeValue[$option['label']] = $option['value']; } 

then you can use directly value to set the data in product like below:

$product->setMarketing($attributeValue['new']) $product->setMarketing($attributeValue['sale']) 

Hope this help !!

You can directly save attribute using below code

public function __construct( \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory, \Magento\Eav\Model\Config $eavConfig, \Magento\Catalog\Model\ResourceModel\Product\Action $action ) { $this->_productCollectionFactory = $productCollectionFactory; $this->_eavConfig = $eavConfig; $this->productActionObject = $action; } public function execute() { $attribute = $this->_eavConfig->getAttribute('catalog_product', 'c_lager'); $options = $attribute->getSource()->getAllOptions(); foreach ($options as $key => $value) { if($key == 0) continue; $options_final[$value['label']] = $value['value']; } //write your code to get data 'new' or 'sale' for $product //save attribute without triggering reindex $this->productActionObject->updateAttributes([$product->getId()], array('marketing' => $options_final['new']), 0); } 

The method $product->setData($attributeCode, $attributeValue) below could set custom attribute successfully.

$product = $this->productRepository->getById($productId); $product->setData($attributeCode, $attributeValue); $this->productRepository->save($product);