# -*- coding: utf-8 -*-

from odoo import fields, models, api

class ResPartner(models.Model):
    _inherit = "res.partner"

    # last_order = fields.Char(string="Letzter Auftrag", readonly=True, copy=False)
    # last_order_date = fields.Date(string="Letztes Auftragsdatum", store=True, copy=False)

    last_order = fields.Char(string="Letzter Auftrag", readonly=True, compute="get_last_order", store=True, copy=False)
    last_order_date = fields.Date(string="Letztes Auftragsdatum", readonly=True, compute="get_last_order", store=True, copy=False)
    last_order_changed = fields.Date(string="Letzte Auftragsänderung", readonly=True, copy=False)

    @api.multi
    @api.depends('last_order_changed')
    def get_last_order(self):
        for partner in self:
#            self.env['sale.order'].search([('partner_id', '=', self.id)], order='id desc', limit=1)
            order_ids = self.env['sale.order'].search([('partner_id', '=', partner.id),
                                                              ('state', 'not in', ['cancel'])], order='date_order desc', limit=1)
            order = order_ids and max(order_ids)
            if order:
                partner.last_order = order.name
                partner.last_order_date = order.date_order