Hello,

Thanks it works,

but can I get only the message when i click on save?

Hi,

Please try the below code.

@api.onchange('state')
def onchange_state_warning(self):
    if self.state == 'done':
        warning_mess = {
            'title': _('Your Warning Title!'),
            'message': _(
                'Your Custom Warning message.'),
        }
        return {'warning': warning_mess}
    return {}

Regards