Event Sale Registration Multi Qty

This module connects the "multiple attendees per registration" feature with event sales. When an event is set up to allow several attendees per registration, selling that event works differently from the standard behaviour.

What changes for users: - On a confirmed sales order for such an event, Odoo creates a single registration whose quantity equals the ordered quantity, instead of one registration per attendee. - The attendee counter on the sales order adds up the quantities of these multi-attendee registrations, while normal events still count one per registration. - In the registration editor screen (the wizard used to edit attendees from a sales order), a read-only Quantity column is shown next to the attendee name. For multi-attendee events, only one line per event and order line is kept, filled with the ordered quantity.

Business rules and automatic behaviour: - Registrations linked to a sales order line are kept aligned with the line quantity. - Registration states are preserved when registrations are created or updated from the order line. - Events that do not use the multi-attendee option keep the standard one-registration-per-attendee behaviour.

The module touches sale.order, sale.order.line, event.registration and the registration editor wizard. It installs automatically when both event sales and multi-quantity registrations are present.