partner-contact/partner_second_lastname/models/res_config_settings.py

# Copyright 2015 Antiun Ingenieria S.L. - Antonio Espinosa
# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).

from odoo import api, models


class ResConfigSettings(models.TransientModel):
    _inherit = "res.config.settings"

    def _partner_names_order_selection(self):
        options = super(ResConfigSettings, self)._partner_names_order_selection()
        new_labels = {
            "last_first": "Lastname SecondLastname Firstname",
            "last_first_comma": "Lastname SecondLastname, Firstname",
            "first_last": "Firstname Lastname SecondLastname",
        }
        return [(k, new_labels[k]) if k in new_labels else (k, v) for k, v in options]

    @api.multi
    def _partners_for_recalculating(self):
        return self.env["res.partner"].search(
            [
                ("is_company", "=", False),
                "|",
                "&",
                ("firstname", "!=", False),
                ("lastname", "!=", False),
                "|",
                "&",
                ("firstname", "!=", False),
                ("lastname2", "!=", False),
                "&",
                ("lastname", "!=", False),
                ("lastname2", "!=", False),
            ]
        )