I want to add products with same barcode but different Companies.

Done everything like at issue :

https://github.com/odoo/odoo/issues/20727

But is not working (maybe because i've got odoo 11).

Tried to overwrite class product.product but no result.

My code :

class CompanyProduct(models.Model):

    _inherit = 'product.product'

    product_company = fields.Many2one('res.company', 'Company', related='product_tmpl_id.company_id', store=True)

    _sql_constraints = [ ('barcode_uniq', 'unique(product_company, barcode)', ("Barcode should be unique by company!")), ]

    @api.model

    def _auto_init(self):

        res = super(CompanyProduct, self)._auto_init()

        self._sql_constraints = [('barcode_uniq', 'unique(product_company, barcode)', _("Barcode should be unique by company!")),]

        return res