Magento2: How to update price with REST without changing category_ids attribute?

Question

Does someone know how to update the product price with REST API without changing the category_ids attribute.

If i perform a PUT /V1/products/{sku} With body

{
 "product":
 {
 "price":"123"
 }
}

It removes the category_ids but looks like all other attributes are left unchanged.

Does anyone know a way to just update the price?

I looked through the document at http://devdocs.magento.com/swagger/ but could not find any other way to change the price on the product.

/Thomas

Answer 1

This looks like a bug to me.

I noticed that the initialize method in Magento\Catalog\Controller\Adminhtml\Product\Initialization\Helper sets category_ids to an empty array if category_ids is not already present in the API request. So not providing category_ids in the API request has the same effect as setting it to an empty array.

My workaround, until a proper fix is (hopefully) released, is to extend the Magento\Catalog\Model\ProductRepository class and override the initializeProductData method, and remove category_ids altogether if it's empty. Your new ProductRepository class then needs to be the preferred Magento\Catalog\Api\ProductRepositoryInterface implementation.

The overriding method in my ProductRepository class looks like this:

protected function initializeProductData(array $productData, $createNew)
{
    $product = parent::initializeProductData($productData, $createNew);

    $categoryIds = $product->getData('category_ids');

    if ( empty($categoryIds) )
    {
        $product->unsetData('category_ids');
    }

    return $product;
}

And my di.xml has:

<preference for="Magento\Catalog\Api\ProductRepositoryInterface" type="My\Namespace\ProductRepository" />

If anyone have a nicer workaround/solution, please share.

(I have opened an issue about this, but have not received any feedback yet: https://github.com/magento/magento2/issues/3354)

Answer 2

sending "null" as value for category_ids does the trick: array("attributeCode" => "category_ids", "value" => null);