Class method vs constant in Ruby/Rails

Question

I was implementing a form that includes a hard-coded dropdown for a collection and I was wondering what would be the best solution, I know both ways exposed below work, stil

Answer 1

What I usually do is have a mix of above-mentioned techniques:

class Player
  JURISDICTIONS = %i(de uk ru)

  def self.jurisdictions
    JURISDICTIONS
  end
end

It has few advantages:

• It provides a clean interface, encapsulating a constant (you call Player.jurisdictions instead of Player::JURISDICTIONS).
• Additional logic can be added later just by altering method.
• The method can be stubbed in tests.

IMHO, performance does not matter here.

Update: Constant can bee hidden using private_constant method (http://ruby-doc.org/core-2.3.0/Module.html#method-i-private_constant)