Magento 2 – How to Change Product Attribute Scope

The problem was caused from another part of the script which loaded the product again to set the store view specific values. And the problem was to set the store id before loading the product.

My old code:

$product_de = Mage::getModel('catalog/product');
$product_de
    ->setStoreId('1')
    ->load($id)
    ... // set some store view specific data
    ->save();

The fixed code:

$product_de = Mage::getModel('catalog/product');
$product_de
    ->load($id)
    ->setStoreId('1')
    ... // set some store view specific data
    ->save();

Now only one entry get's inserted in the catalog_product_entity_* table – with store_id = 0.

Strange because I've seen it in the other order e.g. here: http://www.webguys.de/magento/produkte-mehrsprachig-importieren/ (german website)

Don't know if this is a bug, or there is a reasonable explanation for this behaviour.

Let's say that $product is the instance of your product loaded in a specific store.
You can check this

$basePrice = $product->getAttributeDefaultValue('price');
if ($basePrice === false) {
     //Use default values is checked
} else {
    //$basePrice is the price in the default values.
}

Unfortunately this works only if you call load on the product model, not if you get the product from a collection.

I mean, this works

$product = Mage::getModel('catalog/product')->setStoreId($storeId)->load($productId);
var_dump($product->getAttributeDefaultValue('price'));

This will produce a value if the price is different on the website that contains the store view with the id $storeId and it will produce false if "Use default values" is checked.

This won't work.

$collection = Mage::getModel('catalog/product')->setStorId($storeId)->getCollection()
    ->addAttributeToSelect('entity_id', array('eq' => $productId));
foreach ($collection as $product) {
    var_dump($product->getAttributeDefaultValue('price'));
}

This will always produce false.