Magento 2 - Delete/update all products attribute values by attribute_code

Question

In Magento 2,

How to do a mass deletion of all products attribute values, by attribute_code.

For exemple I want to delete all values for attribute_code = "my_code".

EDIT

I also want to update products attribute values by attribute_code.

I found this :

$productActionObject = $objectManager->create('Magento\Catalog\Model\Product\Action');
$productActionObject->updateAttributes($idArray, array('weight' => 15), 0); 

But my weight values are different between each product ids. I want to update attribute according to an array with product_id as key and weight as value:

$array[1] = 14;
$array[2] = 152;
$array[3] = 58;
...

I can't load every products, because there is a lot of values.

Thansk for your help

Answer 1

Try This

protected $_productCollectionFactory;
protected $_productRepository;
public function __construct(
 .......................................................
 \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
 \Magento\Catalog\Model\ProductRepository $productRepository,
 .......................................................
) {
 .......................................................
 $this->_productCollectionFactory = $productCollectionFactory;
 $this->_productRepository = $productRepository;
 .......................................................
}
public function execute()
{
 $prdcollection = $this->_productCollectionFactory->create();
 $attributeCode = "Attribute_code";
 $attributeValue = "Attribute_Value"
 foreach ($prdcollection as $prdkey => $prdvalue) {
 $prdData = $this->_productRepository->getById($prdvalue->getId());
 $prdData->setCustomAttribute($attributeCode, $attributeValue);
 //$prdData->setData($attributeCode, $attributeValue);
 $this->_productRepository->save($prdData);
 }
}

• Fbr: Thanks but it's not a solution for me. I don't want to make a one shot script. But it's an import script run every day with a cronjob.
• Msquare: Please check my update answer. and update me.