Magento 2 – Get Option Label and Value of Simple Product with Customizable Options

The problem was: I had overwritten Magento_Catalog\templates\product\view\details.phtml, in the file, I had some temporary code that was making some attribute value changes to the configurable and it's children and saving them both.

Calling $product->save() on the configurable product, in this case, caused has_options and required_options in the database table catalog_product_entity to be set to 0 regardless of whether the product has options or not.

I removed the line that saved the configurable product, then reset has_options and required_options to 1 for all configurable products that had options to stop the problem recurring.

Try following way:

use Namespace\Module\Helper\Data as YourHelper;

class Product
{
    /**
     * @var YourHelper
     */
    private $yourHelper;

    /**
     * Product constructor.
     *
     * @param YourHelper $yourHelper
     */
    public function __construct(
        YourHelper $yourHelper
    ) {
        $this->yourHelper = $yourHelper;
    }

    public function afterGetPrice(
        \Magento\Catalog\Model\Product $subject,
        $result
    ) {
        if($subject->getData('has_attribute_x')) {
            $wbtweight = $subject->getWeight();
            $wbtvalue = $this->yourHelper->getConfig('stuff/stuff/variable');
            $wbtfinal = $wbtweight * floatval($wbtvalue);
            return $result + $wbtfinal;
        }

        return $result;
    }
}