Access rule in odoo multicompany product

I need some config in my odoo 8 installation:

this is the first one (I want to try this site):

Using multicompany I need every-company can edit ONLY it's own product.

I have just change the 'Product multi-company' rule in order to share product in child-parent relation --> ['|','|',('company_id.child_ids','child_of',[[login to view URL]]),('company_id','child_of',[[login to view URL]]),('company_id','=',False)] --> like [[login to view URL]]

Here is the situation :

+ Company's Structure

- Main company

- subCompany1

+ Users

- Admin (Main company, Allowed Companies : Main Company)

- sub1user (subCompany1, Allowed Companies : subCompany1)

+ Products

- productmain (company_id = Main company)

- product1 (company_id = subCompany1)

- productglobal (company_id = null ) []

+ In Sales -> Products -> Products :

- Admin user can see/edit ALL he wants

- sub1user can see all product

- sub1user can edit only product1

- sub1user can add(create) new product only within subCompany1

ERP Python

Prosjekt-ID: #6921273

Om prosjektet