Application globals?

I’m curious how best to handle global constants in a Rails application.
That is, where do they go? I’ve seen a couple of possible places – a
module, the ‘application.rb’.

Let’s say I have a user-selectable configuration “config” that is stored
in a table as an INTEGER. The user could select among:

THIS_WAY = 1
THAT_WAY = 2
ANOTHER_WAY = 3

Rather than testing config==2 through the application, I’d rather do
“config==‘THAT_WAY’”. Am I correct is thinking that my application.rb
should have something like:

CONFIG_OPTIONS = [
[‘THIS_WAY’, 1],
[‘THAT_WAY’, 2],
[‘ANOTHER_WAY’, 3]
].freeze

Or is there a better method?