from odoo import models, fields, api class PosPayment(models.Model): _inherit = "pos.payment" employee_id = fields.Many2one('hr.employee', string='Cashier', related='pos_order_id.employee_id', store=True, index=True) @api.depends('employee_id', 'user_id') def _compute_cashier(self): for order in self: if order.employee_id: order.cashier = order.employee_id.name else: order.cashier = order.user_id.name