ruby on rails - Get name of subclass -

lets have class called

a = person::user::base 

how can last subclass called base.

the way know how is:

a.to_s.split('::').last  => "base"  

is there better way?

if use rails (activesupport):

a.to_s.demodulize

if use por (plain-ol-ruby), yes, it's way:

a.to_s.split('::').last