Set limit for custom formfields (radio buttons) the same like limit for events

[Anonymous]

Hi,

for my University project I have to “pimp” the registration a little bit.
On some events, there should be the possibility to choose between several extra options. I realize this with a custom radio formfield.
But now I’d like to set a limit for each of the options.

Let’s say I set a limit of 30 people to the whole event. Now I want to set a limit of 10 people to each of the three options (in this case: three workshops).
How can I do this?

Thanks!

[Author]

Posts