custom field with maximum numbers

Hi Tuan,
is it possible to set up a custom field that uses radio buttons or lists, with a maximum number of places for each option?
We want to set up a conference where there are 2 or more workshop sessions.
Each session would be a separate field, and would have 10 options to choose from.
We need to be able to set the maximum number of places for each option, to prevent too many bookings for the room used for that option.
For example, session 1, option 1 might have a capacity of 20, and session 1, option 2, might have a capacity of 25, and so on.
The same would apply for subsequent sessions.
These sessions need to be set up as radio buttons or a single-selection list, as registrants are required to only select one option from each session.
Thanks, Peter

Hi Peter

Try to use this option eventbookingdoc.joomservices.com/basic-s...ustom-field-quantity , that should help handling your case

However, using that option might cause over booking in case there is one option left but the two registrants book and choose that option almost at the same time

Tuan

Thanks Tuan,
that sounds like it will be perfect for what we need.
Peter

That's great