Magento 2: Show Custom fields in checkout form, information in Order email

Question

We have added a plugin to add extra custom fields in checkout page of magento2 using this plugin. https://github.com/sbodak/magento2-checkout-custom-form

It save this information in Order, and this infomation can be seen if we open order in backend.

You can also check the fields of this plugin in checkout page in front end here.

And here is the code of plugin which is used to show this order fields in Backend.

Now i want to show this information in Order email which is sent to customer automatically after each order. Here is the screen shot of that email template in Marketing->Email Templates. Here you can see in template code there are variables to show different order information. Can i use some variable here which will show this new custome fields of Delivery Date and Delivery Time etc in email templetes?

Answer 1

Add a new module to your mangento installation. in my case Badi\Customvariable add etc/events.xml and add the following code.

<?xml version="1.0" encoding="utf-8"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
    <event name="email_order_set_template_vars_before">
        <observer name="badi_add_custom_variable_to_Order" instance="Badi\Customvariable\Observer\ObserverforAddCustomVariable" />
    </event>
</config>

Now add Observer/ ObserverforAddCustomVariable.php and add the following code

<?php
    namespace Badi\Customvariable\Observer;
    use Magento\Customer\Api\CustomerRepositoryInterface;
    use Magento\Framework\Event\ObserverInterface;
    class ObserverforAddCustomVariable implements ObserverInterface
    {
        protected $customerRepository;
        public function __construct(
            CustomerRepositoryInterface $customerRepository
        ) {
            $this->customerRepository = $customerRepository;
        }
        public function execute(\Magento\Framework\Event\Observer $observer)
        {
            /** @var \Magento\Framework\App\Action\Action $controller */
            $transport = $observer->getEvent()->getTransport();
            if($transport->getOrder() != null)
            {
                $transport['deliverydate'] = $transport->getOrder()->getCheckoutDeliveryDate(); 
                $transport['deliverytime'] = $transport->getOrder()->getCheckoutDeliveryTime();  
            }
        }
    }