Restrict shipping method based on product attribute

Question

I'm trying to restrict a shipping method in afterCollectRates based on a custom product attribute (which I'm injecting with the help of catalog_attributes.xml

public function afterCollectRates(Tablerate $tablerate, $result)
{
    $items = $this->checkoutSession->getQuote()->getAllVisibleItems();
    foreach ($items as $item) {
        if ($item->getProduct()->getMyAttribute()) {
            return false;
        }
    }
    return $result;
}

This hides the shipping method if there's a product with the attribute in cart. However, I need the exact opposite. I need to hide the shipping method if no product in cart does have the attribute.

Obviously the cart can have products with and without the attribute, so I can not simply do !$item->getProduct()->getBulkgood() since the function only accepts return: false;

Any way to make this work?

Answer 1

Try below code. It will only show the shipping method when item contains your attribute otherwise it will return false.

public function afterCollectRates(Tablerate $tablerate, $result)
{
    $items = $this->checkoutSession->getQuote()->getAllVisibleItems();
    foreach ($items as $item) {
        if ($item->getProduct()->getMyAttribute()) {
            return $result;
        }
    }
    return false;
}