class Human < ApplicationRecord
  enum status: {alive: 0, dead: 1}
  aasm column: :status, enum: true do
    state :alive, :dead

    event :dead do
      transitions from: :alive, to: :dead
      after do
        puts "cry when people die"
      end
    end
  end
end

human = Human.last
human.alive? 
# => true
human.status = :dead
human.save

require 'spreadsheet'

book = Spreadsheet.open 'main.xls'
sheet = book.worksheet 0
puts sheet.rows[0][0] # => тест
puts sheet.rows[1][0] # => 42.0
puts sheet.rows[2][0] # => 042

2.5.1 :010 > sheet.rows[2][0]
 => "042" 
2.5.1 :011 > sheet.rows[2][0].class
 => String