Creates a 8-character unique ID based off the current time

unqiue_id_gen.rb

def unique_id
  DateTime.now.strftime('%Q').to_i.to_s52
end

class Numeric
  Alpha52 = ('a'..'z').to_a + ('A'..'Z').to_a
  def to_s52
    return '' if self < 1
    s = ''
    q = self
    loop do
      q, r = (q - 1).divmod(52)
      s.prepend(Alpha52[r])
      break if q.zero?
    end
    s
  end
end

# puts unique_id
#=> awHwanat