How to Efficiently Retrieve Order Items and Product Data in WooCommerce 3?

Retrieving Order Items and Product Objects in WooCommerce 3

In WooCommerce 3, accessing properties from order items has undergone significant changes. Direct access to item IDs like $order_item->get_id() is no longer possible, leading to errors.

Obtaining Product and Variation IDs, Order ID, and WC_Product Object

To retrieve various attributes of an order item, you should use the following methods:

• Product ID: $item->get_product_id()
• Variation ID: $item->get_variation_id()
• Order ID: $item->get_order_id()
• WC_Product Object: $item->get_product()

Retrieving Order Items and WC_Product Object from Order

To obtain order items and their associated WC_Product objects:

1. Retrieve the WC_Order object using wc_get_order($order_id).
2. Iterate through the $order->get_items() loop, wherein each Order Item is of type WC_Order_Item_Product.
3. Use the aforementioned methods to retrieve the desired attributes.

Accessing and Unprotecting Data and Meta Data

WC_Data methods allow you to access and unprotect the data and meta data associated with the order item:

• Unprotected data using WC_Data: $item->get_data(), $item->get_meta_data()
• Array access for legacy arrays: $item['product_id'], $item['variation_id']

Additional Helper Methods

• Getting the product SKU: $product->get_sku()
• Getting line item totals (non-discounted): $item->get_subtotal(), $item->get_subtotal_tax()
• Getting line item totals (discounted): $item->get_total(), $item->get_total_tax()
• Getting formatted meta data: $item->get_formatted_meta_data()

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