Reading multi-parameter assigned parameters (mouthful)

How do I read the multi-parameter parameter that date*_select creates?

Right now it returns something like post[comment][time(1i)],
post[comment][time(2i)], etc. Something like params[:post][:comment]
[:time] won't work.

My implementation isn't exactly like the above, I have multiple
attributes that are using the same hash format so there'll be an input
with name field[name_of_whatever][value], and maybe a normal select
with format field[my_user][value]. Since everything is using value I
want to be able to do field[created_at][value] or whatever.

Thanks,
Brian Butz