Alert in Sales Order Save After Observer – How to Implement in Magento 2

event-observermagento2

I am triggering sales_order_save_after event after order status has been completed.

public function execute(Observer $observer) {
    $order = $observer->getEvent()->getOrder();
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $checkoutSession=$objectManager->create('Magento\Checkout\Model\Session');
    $status = $checkoutSession->getLastOrderStatus();
    if( $status == "complete")
    { 
        echo "<script>javascript: alert ("message") </script>";
    }
}

and my event.xml file in Vendor/Namespace/etc/adminhtml/event.xml

I just want to show this popup when the order is completed in the admin panel of Magento 2 can anyone help to solve it. and how can I get to know my event is triggered or not.

Best Answer

Add this below code in your observer :

namespace Custom\Module\Observer;

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

class OrderStatusChange implements ObserverInterface {

    /**
     * @var \Magento\Framework\Message\ManagerInterface
     */
    protected $messageManager;
    /**
     * @var \Magento\Framework\App\Response\RedirectInterface
     */
    protected $redirect;
    public function __construct(
        ...
        \Magento\Framework\App\Response\RedirectInterface $redirect,
        \Magento\Framework\Message\ManagerInterface $messageManager,
        ...
    ) {
        ... 
        $this->redirect = $redirect;
        $this->messageManager = $messageManager;
        ...
    }
    public function execute(Observer $observer) {
        $order = $observer->getEvent()->getOrder();
        $controller = $observer->getControllerAction();

        if($order->getState() == "complete")
        { 
            $this->messageManager->addSuccess(__('Order status change successfully')); // You can set your success message here
            $this->redirect->redirect($controller->getResponse(), $this->redirect->getRefererUrl()); // You can set here on which path you want to redirect
        }
    }
}

Remove generated folder and flush cache

Related Solutions

CE 1.9.2 – Custom sales_order_save_after Observer Fires Twice

I donot know why this is happing but you can prevent using registry variable (Mage::registry('VARIEABLE')).

<?php
class Test_SupplierNotification_Model_Observer
{
    public function notifySupplier(Varien_Event_Observer $observer) {

  /*check registry variable and 

  on first time Mage::registry('prevent_observer') does not save value 
  So, it will execuate only on first time 
  */
  if(!Mage::registry('prevent_observer')):
      $order = $observer->getEvent()->getOrder();
      $stateProcessing = Mage_Sales_Model_Order::STATE_PROCESSING;
   // Assign value to registry variable
  Mage::register('prevent_observer',true);

      if($order->getState() == $stateProcessing && $order->getOrigData('state') != $stateProcessing) {
          Mage::log("hello", null, 'test_suppliernotification.log');
          return true;
      }

      endif;
    }
}

Magento 2 – Set Custom Price of Product When Adding to Cart Code Not Working

Please use this even checkout_cart_product_add_after, and also I suggest you that

ObserverInterface has only one method which is execute, so write your code in this method.

And do not use parent Item because while you are adding to cart any item then price depend upon child item so the best way is to use directly that item object that you are getting. So best practice is to use that item itself.

And also return $this object at the end of your code inside execute method.

For eg: namespace Navin\Testcart\Observer;

use Magento\Framework\Event\ObserverInterface;
use Magento\Framework\App\RequestInterface;

class CustomPrice implements ObserverInterface
{
    public function execute(\Magento\Framework\Event\Observer $observer) {

        $item=$observer->getEvent()->getData('quote_item');
        $product=$observer->getEvent()->getData('product');
        // here i am using item's product final price
        $price = $item->getProduct()->getFinalPrice()+10; // 10 is custom price. It will increase in product price.
        // Set the custom price
        $item->setCustomPrice($price);
        $item->setOriginalCustomPrice($price);
        // Enable super mode on the product.
        $item->getProduct()->setIsSuperMode(true);
        return $this;
    }

}

Hope this will help you. :)

Best Answer

Related Solutions

CE 1.9.2 – Custom sales_order_save_after Observer Fires Twice

Magento 2 – Set Custom Price of Product When Adding to Cart Code Not Working

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