I used your suggestion Michael, and it worked fabulously. I went alittle further with it to check against called methods, something like this:

@api.multi

def write(self, vals):

invoice_refund = request.params.get('method') in 'invoice_refund'

move_reconcile = request.params.get('method') in ('assign_outstanding_credit', 'remove_move_reconcile')

group_account_edit = self.env.user.has_group('custom_sec_group.group_account_edit')

_logger.debug('Requested params method: [%s.%s]' % (request.params.get('model'), request.params.get('method')))

_logger.debug('Allow invoice_refund method: %s', invoice_refund)

if any(state != 'draft' for state in set(self.mapped('state'))

if not (group_account_edit or invoice_refund or move_reconcile)):

raise UserError(_('Edit allowed only in draft state. [%s.%s]' % (request.params.get('model'), request.params.get('method'))))

else:

_logger.info('Written vals: %s', vals)

return super().write(vals)

Hi, where should I put this write method?

@cteng You'll need to extend the model for which you want to disallow editing and override the write there.