Magento 2: Disable "Cash on delivery" for downloadable products

Question

I need to disable the CoD payment method for carts with downloadable products. I started working on a plugin, but got hung up on this - have no idea how to get product types from cart.

Any ideas?

Answer 1

Best idea to use event/observer concept.

Fire an observer on event: payment_method_is_active.

Observer:

<?php
namespace [Vendorname]\[Modulename]]\Observer;

use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\App\Request\DataPersistorInterface;
use Magento\Framework\App\ObjectManager;

class ObserverforDisabledCod implements ObserverInterface
{
    /**
     *
     * @param \Magento\Framework\Event\Observer $observer
     * @return void
     */
    public function execute(\Magento\Framework\Event\Observer $observer)
    {
        $result = $observer->getEvent()->getResult();
        $method_instance = $observer->getEvent()->getMethodInstance();
        $quote = $observer->getEvent()->getQuote();

        if ($quote === null || $method_instance->getCode() != 'cashondelivery')
            return;

        /* Disable All payment gateway exclude Your payment Gateway */
        $items = $quote->getAllVisibleItems();
        foreach ($items as $eachitem) {
            if ($eachitem->getProductType() == 'downloadable') {
                $result->setData('is_available', false);
                break;
            }
        }

    }
}

Answer 2

Didn't work for me, needed to make the following changes:

1. Replaced $result->isAvailable = false; with $result->setData('is_available', false);
2. Replaced $items= as $eachitem with $items as $eachitem

(magento 2.1.7)