Update Order status on action of place order?

Question

I've got a custom payment module. How can I update the order status to complete on the action of place order? If the order is placed choosing the custom payment method.

Thanks in advance!

Answer 1

You can use event observer for changing status of an order:

sales_order_place_after

You can visit below link:

Answer 2

you can use events: sales_order_save_after and sales_order_state_change_before. I refer sales_order_save_after event.

In our observer, we can get the state of order:

Observer/SalesOrderAfterSave.php

public function execute(\Magento\Framework\Event\Observer $observer)
{
    $order = $observer->getEvent()->getOrder();
    if ($order instanceof \Magento\Framework\Model\AbstractModel) {
       if($order->getState() == 'canceled' || $order->getState() == 'closed') {
            //Your code here
       }
    }
    return $this;
}

you can read more about observer : Magento 2 events list

NOTE: you should try with Plugin:

etc/di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">

    <type name="Magento\Sales\Api\OrderRepositoryInterface">
        <plugin name="order_state_plugin"
                type="Company\Module\Model\Plugin\OrderStatePlugin"/>
    </type>

</config>

Plugin:

<?php

namespace vendor_name\module_name\Plugin;

class file.name
{
/**
 * @param \Magento\Sales\Api\OrderRepositoryInterface $subject
 * @param \Magento\Sales\Api\Data\OrderInterface $result
 * @return mixed
 * @throws \Exception
 */
public function afterSave(\Magento\Sales\Api\OrderRepositoryInterface $subject,$result)
     {
    if($result->getState() == Order::STATE_COMPLETE) {
        ......
    }
    return $result;

}

accept if helps