Magento setting Product Attribute's “Use Default Value” using updateAttributes

Question

I have a multi-store setup and I am setting a Product\'s Attribute for a particular store to use the \"Use Default Value\" option - (ie to use the value in the Store View), as f

Answer 1

The "Use Default Value" flag isn't stored in the database anywhere.

Magento core uses that flag to do this when saving products:

   /**
     * Check "Use Default Value" checkboxes values
     */
    if ($useDefaults = $this->getRequest()->getPost('use_default')) {
        foreach ($useDefaults as $attributeCode) {
            $product->setData($attributeCode, false);
        }
    }

Before doing some other things.

I would look at Mage_Adminhtml_Catalog_ProductController (app/code/core/Mage/Adminhtml/controllers/Catalog/ProductController.php) and learn how Magento core does it.

Specifically saveAction() and _initProductSave()

I hope this points you in the right direction.