AASM defines constants for each state name

Example:

  class Foo
    include AASM

    aasm do
      state :initialized
      state :calculated
      state :finalized
    end
  end

  > Foo::STATE_INITIALIZED
  => :initialized
  > Foo::STATE_CALCULATED
  => :calculated

You may find this useful in custom scopes when using ActiveRecord, or
when testing your classes.