I am trying to remember. I had a whole load of trouble with this myself years ago. Given
two selectOneMenus, the first needs a value change listener which updates a list which is
stored in backing bean (obviously). The first selectOneMenu also needs a child f:ajax tag
which render= the 2nd selectOneMenu. I could never make this stuff work with request
scoped beans, but it does work with view scoped beans. It's a bit late and I can't go on
further now but I'll check back, this is however a basic
pattern for getting this to work,
but I may well have forgotten something. Try it.
Brendan.