Add Order attribute to New Order Email

Question

How do I add the value of an order attribute to the New Order Email template. Specifically an attribute called delivery_date stored in sales_order_grid.

I tried to reverse engineer how {{var order.getShippingDescription()}} works but with no success.

EDIT: I should add that another method I tried was by editing the Email Templates...

vendor/magento/module-sales/view/frontend/templates/email/items/order/default.phtml

...and adding this line to it.

$deliverydate = $order->getDeliveryDate()

(Hoping that I could grab the data the same way that I'd grab a Product Attribute). But that method also returned no value.

Answer 1

you should use the email_order_set_template_vars_before event.

write an observer for the event and add you desired data. then in the email template you have to add the data.