class ProductTemplateKit(models.Model):
    _inherit = 'product.template'
    international_code = fields.Char('Codigo Internacional')
    is_kit = fields.Boolean(
        string='Es kit',
        default=False)
    product_combo_ids = fields.One2many('product.combo', 'product_parent_id', 'Combo de productos')


class ProductCombo(models.Model):
    _name = 'product.combo'
    product_parent_id = fields.Many2one('product.product', 'Producto padre', required=True)
    product_id = fields.Many2one('product.product', string='Producto', required=True)
    quantity = fields.Integer('Cantidad', required=True)
    price_unit = fields.Float('Precio unitario', required=True)