Hi, Grzegorz

You can achieve your requirement using "onchange" decorator in Odoo. Like below example

 @api.onchange('partner_id')
    def _onchange_partner_id(self):
        res = {'domain': {'partner_id': []}}
        if self.partner_id:
            res['domain']['partner_id'] = [('partner_id', '=', partner_id.id)]
        return res

Feel free to ask in case you have any confusion related to the above code.

Thanks,

Ashish Singh (Team Lead)

Webkul Software Private Limited

Thanks for the answer.
This will work only when partner_id is updated, not in existing records with partner_id set earlier.
Any way to trigger this dynamic domain code every time when form view is loaded?