[18.0+] account_edi_ubl_cii: IBR-022 wrongly reports "Invoiced quantity is missing" for invoice lines with quantity 0 #289575

Odoo Version

• 17.0
• 18.0
• 19.0
• Other (specify)

Steps to Reproduce

Impacted versions

• 18.0 (reproduced on Odoo.sh on a client environment)
• master / saas-* carry the same code

The constraint was introduced in 18.0 by 081221a ("[FIX] account_edi_ubl_cii, account_peppol: make PINT use UBL export", 2026-08-20). Before that commit the same invoices were exported and sent over Peppol without any error.

Steps to reproduce

1. Belgian company, Peppol enabled, customer with a Peppol endpoint.
2. Create a customer invoice with several lines, and set Quantity = 0 on at least one of them (unit price and taxes set normally, so the line totals 0.00).
3. Confirm the invoice.
4. Print & Send → check per e-mail and met Peppol → Send.

Current behavior

Sending is blocked by an Invalid Operation dialog:

The reported lines are exactly the lines with quantity 0. The quantity is not missing — cbc:InvoicedQuantity is built for every line and renders as 0.0.

Cause — addons/account_edi_ubl_cii/models/account_edi_ubl_pint.py:504-509 (18.0):

# [IBR-022] - Each Invoice line (ibg-25) MUST have an invoiced quantity (ibt-129).
qty_node = line['cbc:InvoicedQuantity'] if is_invoice else line.get('cbc:CreditedQuantity', {})
if qty_node.get('_text') in [None, False]:

_text is the raw float from _ubl_add_line_invoiced_quantity_node (base_line['quantity'], account_edi_ubl.py:859-864). In Python 0.0 == False, so 0.0 in [None, False] evaluates to True and a present, valid quantity of 0 is reported as missing.

account.edi.xml.ubl_bis3 inherits account.edi.ubl_pint_eu, so this affects plain Peppol BIS Billing 3.0 exports, not only PINT.

Expected behavior

A line with quantity 0 exports and sends normally. EN16931 BR-22 requires the invoiced quantity to be present, and 0 is a valid value — the generated XML already contains <cbc:InvoicedQuantity unitCode="C62">0.0</cbc:InvoicedQuantity>, which passes the official OpenPeppol schematron.

Suggested fix

Test for absence instead of falsiness:

qty_text = qty_node.get('_text')
if qty_text is None or qty_text is False:

The neighbouring IBR checks that use if not ... on numeric _text values are worth a look for the same problem.

Workaround

Remove the zero-quantity lines, or give them quantity 1 at price 0.

Log Output

Support Ticket

No response