Rails - Nov 2006 - accessing constants in model from controller.

Hello,

In my model Example, I''ve defined three types as such:

class Example < ActiveRecord::Base
  TYPE_A = ''A''
  TYPE_B = ''B''
  TYPE_C = ''C''

  def select....
  end
end

How can I access these types in my controller.  I''m trying the
following
with my controller named Read:

def init
  a = Example.TYPE_A
end

It won''t allow me to declare the types and gives me a syntax error. 
Any
help would be appreciated.  Aren''t these just class variable
declarations
and should be available through the class?

Thanks.
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