Hi I watch an example of inherit with product.product, and I wondering if I can use sale.order.line instead product.product but apparently, is very diferent.

my.py

from openerp import models, fields, api

class Primaria(models.Model):
    _inherit = "sale.order.line"
    
    lel= fields.Char(string="lol")

my.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
    <data>
        <record model="ir.actions.act_window" id="super_sale_order">
            <field name="name">Agregar empresas</field>
            <field name="res_model">sale.order.line</field>
            <field name="view_type">form</field>
            <field name="view_mode">kanban,tree,form</field>
            <field name="help" type="html">
            <p class="oe_view_nocontent_create">Agrega la primera empresa</p>
            </field>
        </record>

        <record model="ir.ui.view" id="product_normal_form_view_inherit">
            <field name="model">sale.order.line</field>
            <field name="inherit_id" ref="sale.order.line_normal_form_view"/>
            <field name="arch" type="xml">
                <field name="name" position="after">
                    <field name="lel"/>
                </field>
            </field>
        </record>

        <menuitem id="super_menu" name="Velfasa"/>
        <!-- Submenu 1-->
        <menuitem id="menudos" name="Open Academy" parent="super_menu"/>
        <menuitem id="ingreso_de_facturas" name="Ingreso de facturas" parent="menudos" action="super_sale_order"/>

    </data>
</openerp>