# -*- coding: utf-8 -*- from openerp import models, fields, api, _ import openerp.addons.decimal_precision as dp class sale_order_line(models.Model): _inherit = 'sale.order.line' multiplied_field = fields.Float(string='Total', compute='_compute_multiplied_field') @api.depends('product_uom_qty', 'price_unit') def _compute_multiplied_field(self): for line in self: line.multiplied_field = line.product_uom_qty * line.price_unit