multi-company check

test.py

# -*- coding: utf-8 -*-
# Part of Odoo. See LICENSE file for full copyright and licensing details.

from odoo import fields, models, api, _
from odoo.exceptions import UserError

class StockPutawayRule(models.Model):
    _name = 'stock.putaway.rule'
    _order = 'sequence,product_id'
    _description = 'Putaway Rule'
    _company_consistency_check = True

    def _domain_product_id(self):
        domain = "[('type', '!=', 'service'), '|', ('company_id', '=', False), ('company_id', '=', company_id)]"
        if self.env.context.get('active_model') == 'product.template':
            return [('product_tmpl_id', '=', self.env.context.get('active_id'))]
        return domain

    product_id = fields.Many2one(
        'product.product', 'Product',
        default=_default_product_id, domain=_domain_product_id,
        company_restrict=True, ondelete='cascade')
    category_id = fields.Many2one('product.category', 'Product Category',
        default=_default_category_id, domain=_domain_category_id,
        ondelete='cascade')
    location_in_id = fields.Many2one(
        'stock.location', 'When product arrives in',
        domain="[('child_ids', '!=', False), '|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        company_restrict=True,  default=_default_location_id, required=True, ondelete='cascade')
    location_out_id = fields.Many2one(
        'stock.location', 'Store to',
        domain="[('id', 'child_of', location_in_id), ('id', '!=', location_in_id), '|', ('company_id', '=', False), ('company_id', '=', company_id)]",
        company_restrict=True, required=True, ondelete='cascade')
    sequence = fields.Integer('Priority', help="Give to the more specialized category, a higher priority to have them in top of the list.")
    company_id = fields.Many2one(
        'res.company', 'Company', required=True,
        default=lambda s: s.env.company.id, index=True)

    def write(self, vals):
        if 'company_id' in vals:
            for rule in self:
                if rule.company_id.id != vals['company_id']:
                    raise UserError(_("Changing the company of this record is forbidden at this point, you should rather archive it and create a new one."))
        res = super(StockPutawayRule, self).write(vals)
        return res