How to Convert Custom Field From Quote Item to Order Item in Magento 2

Today, we will learn about the way to convert custom field from quote item to order item in Magento 2, through the below instructions.

Overview of converting a custom feild from quote item to order item in Magento 2

• Step 1: Add a di.xml file
• Step 2: Identify a code, a plugin
• Step 3: Add a class to your module, then identify a function

Step 1: Add a di.xml file

In the module app/code/Mageplaza/HelloWorld/etc, please add the di.xml file.

Step 2: Identify a code, a plugin

In the di.xml file, let’s identify a code:

<type name="Magento\Quote\Model\Quote\Item\ToOrderItem">
        <plugin name="HelloWorld_to_order_item" type="Mageplaza\HelloWorld\Model\Plugin\Quote\HelloWorldToOrderItem"/>
</type>

Then, identify a plugin Mageplaza\HelloWorld\Model\Plugin\Quote\HelloWorldToOrderItem” of class “Magento\Quote\Model\Quote\Item\ToOrderItem

Step 3: Add a class to your module, then identify a function

• In the module, add the class Mageplaza\HelloWorld\Model\Plugin\Quote\HelloWorldToOrderItem, and identify the function aroundConvert which will convert the custom data from quote item to order item at the same time.

public function aroundConvert(
        \Magento\Quote\Model\Quote\Item\ToOrderItem $subject,
        \Closure $proceed,
        \Magento\Quote\Model\Quote\Item\AbstractItem $item,
        $additional = []
    ) {
        /** @var $orderItem Item */
        $orderItem = $proceed($item, $additional);
$orderItem->setHelloWorldCustomData($item->getHelloWorldCustomData());
        return $orderItem;
    }

• You will achieve the result of function convert in class Magento\Quote\Model\Quote\Item\ToOrderITem from the first line of this function $orderItem = $proceed($item, $additional);.

• Next, create the value of HelloWorldCustomData for the result of function convert class Magento\Quote\Model\Quote\Item\ToOrderItem.

• Then, return an object $orderItem to recover result of the function convert in the class Magento\Quote\Model\Quote\Item\ToOrderItem.

That is all requirements every Magento 2 store owners should apply to copy custom data from quote item to order item