I tried to get full list of order item attributes by this url: api/rest/orders/25/items . There are:
"item_id": "62",
"parent_item_id": null,
"product_type": "simple",
"sku": "89110065",
"name": "Diamond Glow Nourishing Mud Mask",
"qty_canceled": "0.0000",
"qty_invoiced": "0.0000",
"qty_ordered": "1.0000",
"qty_refunded": "0.0000",
"qty_shipped": "0.0000",
"price": "277.3100",
"base_price": "277.3100",
"original_price": "330.0000",
"base_original_price": "330.0000",
"tax_percent": "19.0000",
"tax_amount": "52.6900",
"base_tax_amount": "52.6900",
"discount_amount": "0.0000",
"base_discount_amount": "0.0000",
"row_total": "277.3100",
"base_row_total": "277.3100",
"price_incl_tax": "330.0000",
"base_price_incl_tax": "330.0000",
"row_total_incl_tax": "330.0000",
"base_row_total_incl_tax": "330.0000"
If you look at the order item object, you will see that it has more attributes. Is it possible to add a custom attribute to this list? Or I have to overwrite the existing API to add a custom attribute?