Magento – Unset custom data from product attribute

customcustom-attributesmagento2product

I am trying to update a product with some custom attributes. I need to unset data that is being passed to set the value to none. I am currently on Magento 2.1

... 
 $updatedProduct->unsetData($customAttributeA);
 $updatedProduct->save();

I added a break-point after unset the data, customAttributeA row is indeed gone from the product data array. However, after calling the save function, customAttributeA comes back into the array, with the value previously set.

Is there a way to persist the unsetData during the save function? I have also tried

$product->setData($customAttributeA , "");
And
$product->setCustomAttribute($customAttributeA , "");

However, none of them seems to work.

The attribute type i am trying to unset is a dropdown type.

Cheers

edit- this is a snapshot of the code i am using to set/unset the data

 foreach ($listTypes as $key => $value) {
    if (isset($params[$value])){
       if(isset($params[$value . '_mid'])) {
           $product->setCustomAttribute($value, $params[$value.'_mid']);
       }else{     
           // unset data here
       }
    }
 }

 $product->save();

Best Answer

I found this one https://stackoverflow.com/a/8672847. It looks like Magento 1 code but it's work for me.

$product->setData('unwanted_attribute',null);        
$resource = $product->getResource();
$resource->saveAttribute($product,'unwanted_attribute');

Related Solutions

Magento – Url key disappearing and visibility changing when saving a product from collection

Don't save a product from a collection.
A product collection item does not contain all the data for a product. You can end up losing a lot of attribute values if the attribute is not in the collection.
If you want to call $product->save() to update a product, just to be on the safe side, first you must call $product->load().

If you want to update just one attribute (or a few of them) use this. It's faster.

Mage::getModel('catalog/product_action')->updateAttributes(
    array($productId),
    array('attribute_code'=>$attributeValue),
    $storeId //use '0' for default values
);

The code above works for many products at a time, and many attributes at a time.

Magento – How to set custom created attribute value for product

Ok, here's a test script I used to verify if newly added attributes are working, by setting defaults on a specific product. As you can see, I used Mage_Catalog_Model_Product->addAttributeUpdate(). This was done on a Magento 1.3, but the test script worked flawlessly. Perhaps it helps you to track down the issue.

<?php
/**
 * Setup test product for verification of functionality
 */
require_once(dirname(__FILE__).'/PATH/TO/app/Mage.php');
umask(0);
Mage::setIsDeveloperMode(true);
Mage::app('YOUR_STORE_CODE_HERE');

function lookupAttributeId($needle, $haystack)
{
    foreach($haystack AS $dict)
    {
        if( $dict['label'] == $needle)
            return $dict['value'];
    }

    return false;
}
function getAttributesByValueAsString($code, $values=array())
{
    $tmp = array();
    /** @var array $allOptions */
    $allOptions = Mage::getResourceModel('eav/entity_attribute_collection')
        ->setCodeFilter($code)
        ->getFirstItem()
        ->getSource()
        ->getAllOptions();

    foreach($values AS $value)
    {
        if( ($id = lookupAttributeId($value, $allOptions)) !== false )
            $tmp[] = $id;
        else
            fprintf(STDERR, 'Value %s not found%s', $value, PHP_EOL);
    }

    return implode(',', $tmp);
}
$product_id = 12167; // HARDCODED
/** @var Mage_Catalog_Model_Product $product */
$product = Mage::getModel('catalog/product')->load($product_id);
// Attributes below are specific for this store.
// first argument is attribute name, second is an array of labels. This
// specific attribute is a multi-select.
$attributesBevatGeen = getAttributesByValueAsString(
    'bevat_geen',
    array('Soja', 'Suiker')
);
$attributesIsWel = getAttributesByValueAsString(
    'is_wel',
    array('Organisch', 'Veganistisch')
);

// webonly is a boolean and therefore different.
$product->addAttributeUpdate('webonly', '1', 5);
$product->addAttributeUpdate('bevat_geen', $attributesBevatGeen, 5);
$product->addAttributeUpdate('is_wel', $attributesIsWel, 5);

// Reindex required for frontend. Should not affect backend as backend does
// direct EAV queries.
// won't include it, as indexes are quite different in 1.3 Magento.
// include(dirname(__FILE__). DIRECTORY_SEPARATOR . 'reindex.php');

printf('Product can be viewed at: %scatalog/product/view/id/%d%s', Mage::getBaseUrl(), $product_id, PHP_EOL);

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