how to set order status as 'complete' in magento

Question

how do i set order status as \'complete\' manually.

I am using the following code, but its giving error saying, The Order State \'complete\' must not be set man

Answer 1

well, the actual way to make order state COMPLETE is to create invoice and shipment, after which the order state auto gets COMPLETE state. Like:

//create invoice for the order
$invoice = $order->prepareInvoice()
                   ->setTransactionId($order->getId())
                   ->addComment("Invoice created from cron job.")
                   ->register()
                   ->pay();

$transaction_save = Mage::getModel('core/resource_transaction')
                            ->addObject($invoice)
                            ->addObject($invoice->getOrder());

$transaction_save->save();
//now create shipment
//after creation of shipment, the order auto gets status COMPLETE
$shipment = $order->prepareShipment();
if( $shipment ) {
     $shipment->register();
     $order->setIsInProcess(true);

     $transaction_save = Mage::getModel('core/resource_transaction')
                                ->addObject($shipment)
                                ->addObject($shipment->getOrder())
                                ->save();
}