multiparameter

What Does ActiveRecord::MultiparameterAssignmentErrors Mean?

I have a rails form with a datetime_select field. When I try to submit the form, I get the following exception: ActiveRecord::MultiparameterAssignmentErrors in WidgetsController#update 1 error(s) on assignment of multiparameter attributes If it's a validation error, why don't I see an error on the page? This is in Rails 2.0.2 ...

How do ruby on rails multi parameter attributes *really* work (datetime_select)

I believe that datetime_select is black magic. What I'm really trying to figure out is the whole 1i,2i,3i,4i... multiple parameters stuff. Specifically how is it handled in the back end (activerecord, something else?). What's with the 'i' after the order-number? Is it a type-specifier? If so what are other types that are available? I...