Untitled

=begin
 'frozen' value for end_at in scope :active
 The same frozen value is propogated to :national scope!
 The Time.now will be set to the first time the scope is evaluated.
 This is explained at http://api.rubyonrails.org/classes/ActiveRecord/NamedScope/ClassMethods.html

 * NON-WORKING SOLUTION *
=end

class Something
 scope :active, where('end_at > ?', Time.now)
 scope :national, where(:is_national => true).active
end