Yes, this approach is feasible in Odoo using Odoo Studio fields and Automated Actions.

Your logic is generally correct. The recommended setup would be:

For Sales Orders

1. Create a custom Datetime field (x_studio_old_order_date).

2. Make it readonly when state = 'sale'.

3. Create an Automated Action:

   • Model: Sales Order

   • Trigger: On Update

   • Domain: [('state','=','sale')]

4. Python code:

if record.x_studio_old_order_date:
    record.write({
        'date_order': record.x_studio_old_order_date
    })

For Inventory Receipts

1. Add a custom Datetime field on the Stock Picking model.

2. Field conditions:

   • Invisible when state = 'draft'

   • Required

   • Readonly when state = 'done'

3. Create an Automated Action on Stock Picking.

4. Python code:

if record.scheduled_date:
    record.write({
        'date_done': record.scheduled_date
    })

Just ensure that modifying fields like date_order or date_done does not impact reporting or stock/accounting timelines in your system.

Hope this works for you! Feel free to reach out for further discussion.

Regards,

Zehntech Technologies Inc.