PurchaseReceiptCommodity

{
    "purchase_item_id": 20001,
    "commodity_id": 30001,
    "commodity_code": "SP0002",
    "unit": "斤",
    "num": 10,
    "total_price": 125.5,
    "batch_no": "BN20260511001",
    "production_date": "2026-05-11"
}