ARGOMENTO: Apri fattura e segna ordine come DONE

def create_invoice(self, cr, uid, ids, context=None):
        wf_service = netsvc.LocalService('workflow')
        if context is None:
            context = {}
        ctx = context.copy()
        ctx['_partial_invoice'] = {}
        so_line_obj = self.pool['sale.order.line']
        so_obj = self.pool['sale.order']
        order_lines = {}
        for wiz in self.browse(cr, uid, ids, context=context):
            for line in wiz.line_ids:
                if line.price_unit == 0:
                    return self.write(cr, uid, ids, {'state': 'done'}, context=context)
                sale_order = line.sale_order_line_id.order_id
                if line.price_unit > (line.order_qty * line.prod_original_quantity - line.qty_invoiced):
                    raise orm.except_orm(_('Incorrect Data'),
                        _("Errore! L'importo inserito non è corretto"))
                if sale_order.id not in order_lines:
                #    order_lines[sale_order.id] = [line.sale_order_line_id.id]
                    order_lines[sale_order.id] = []
                order_lines[sale_order.id].append(line.sale_order_line_id.id)
                ctx['_partial_invoice'][line.sale_order_line_id.id] = line.price_unit #line.quantity * 
        for order_id in order_lines:
            line_ids = order_lines[order_id]
            invoice_line_ids = so_line_obj.invoice_line_create(cr,
                                                               uid,
                                                               line_ids,
                                                               context=ctx)
            order = so_obj.browse(cr, uid, order_id, context=context)
            invoice_id = so_obj._make_invoice(cr, uid,
                                              order,
                                              invoice_line_ids,
                                              context=ctx)
            _logger.info('created invoice %d', invoice_id)
            if all(line.invoiced for line in order.order_line):
                wf_service.trg_validate(uid, 'sale.order', order.id, 'manual_invoice', cr)
        if context.get('open_invoices', False):
            return self.open_invoices(cr, uid, ids, invoice_id, context=context)
        return {'type': 'ir.actions.act_window_close'}

    def open_invoices(self, cr, uid, ids, invoice_ids, context=None):
        """ open a view on one of the given invoice_ids """
        ir_model_data = self.pool.get('ir.model.data')
        form_res = ir_model_data.get_object_reference(cr, uid, 'account', 'invoice_form')
        form_id = form_res and form_res[1] or False
        tree_res = ir_model_data.get_object_reference(cr, uid, 'account', 'invoice_tree')
        tree_id = tree_res and tree_res[1] or False

        return {
            'name': _('Invoice'),
            'view_type': 'form',
            'view_mode': 'form,tree',
            'res_model': 'account.invoice',
            'res_id': invoice_ids,
            'view_id': False,
            'views': [(form_id, 'form'), (tree_id, 'tree')],
            'context': {'type': 'out_invoice'},
            'type': 'ir.actions.act_window',
        }