from odoo import models, fields, api class PurchaseOrderLine(models.Model): _inherit = "purchase.order.line" price_subtotal_undiscounted = fields.Monetary( string="Subtotal witout Discount", compute="_compute_price_subtotal_undiscounted", currency_field="currency_id", ) @api.depends("product_qty", "price_unit") def _compute_price_subtotal_undiscounted(self): for line in self: line.price_subtotal_undiscounted = line.product_qty * line.price_unit