How to add new Option to drop down attributes magento2?

Question

How to add an new option to product dropdown attribute? If the option already exist it has to skip adding else add option with new value.

I followed the below link How Magento2 add attribute option programmatically (not in setup) where it is creating the option but inserting duplicate if already the option is present.

And can we get the option id after insert is success?

Answer 1

Try following way:

protected $eavAttributeFactory;
protected $attributeOptionManagement;

public function __construct(
    \Magento\Eav\Model\Entity\AttributeFactory $eavAttributeFactory,
    \Magento\Eav\Api\AttributeOptionManagementInterface $attributeOptionManagement
) {

    $this->eavAttributeFactory = $eavAttributeFactory;
    $this->attributeOptionManagement = $attributeOptionManagement;
}

And then

$magentoAttribute = $this->eavAttributeFactory->create()->loadByCode('catalog_product', 'test_attribute');

$attributeCode = $magentoAttribute->getAttributeCode();
$magentoAttributeOptions = $this->attributeOptionManagement->getItems(
    'catalog_product',
    $attributeCode
);
$attributeOptions = ['Test2', 'Test3'];
$existingMagentoAttributeOptions = [];
$newOptions = [];
$counter = 0;
foreach($magentoAttributeOptions as $option) {
    if (!$option->getValue()) {
        continue;
    }
    if($option->getLabel() instanceof \Magento\Framework\Phrase) {
        $label = $option->getText();
    } else {
        $label = $option->getLabel();
    }

    if($label == '') {
        continue;
    }

    $existingMagentoAttributeOptions[] = $label;
    $newOptions['value'][$option->getValue()] = [$label, $label];
    $counter++;
}

foreach ($attributeOptions as $option) {
    if($option == '') {
        continue;
    }

    if(!in_array($option, $existingMagentoAttributeOptions)) {
        $newOptions['value']['option_'.$counter] = [$option, $option];
    }

    $counter++;
}

if(count($newOptions)) {
    $magentoAttribute->setOption($newOptions)->save();
}

Answer 2

And if we wants to update existing attribute options also insert the new one?

I have a dropdown attribute with in "Admin" value a code and in "Default Store View" a value.

If I found an existing attribute I must update the Default Store View.

Thanks!