gistfile1.rb

   def generate_token(length=8)
     alphanumerics = ('a'..'z').to_a.concat(('A'..'Z').to_a.concat(('0'..'9').to_a))
     self.token = alphanumerics.sort_by{rand}.to_s[0..length]
     
     # Ensure uniqueness of the token..
     generate_token unless Widget.find_by_token(self.token).nil?
  end