from odoo import fields, models class TaxOffice(models.Model): _name = 'l10n_pl_tax_office' _description = 'Tax Office in Poland' _rec_names_search = ['name', 'code'] _order = 'code' code = fields.Char('Code', required=True) name = fields.Char('Description', required=True) _sql_constraints = [ ('code_company_uniq', 'unique (code)', 'The code of the tax office must be unique !') ] def name_get(self): result = [] for tax_office in self: name = tax_office.code + ' ' + tax_office.name result.append((tax_office.id, name)) return result