gistfile1.txt

# for future bookings

ActiveRecord::Base.logger.level = 1  # disable query logs
bookings = Booking.where('check_out >= ?', Time.now);nil
bookings.each do |booking|

  city = booking&.property&.city
  new_value = booking.decorate.check_out.change(hour: 11, min: 0)
  booking.guest_check_out_at = city ? city.utc_time(new_value) : new_value

  PaperTrail.whodunnit('Edipo F: set initial value for guest_check_out_at') do  
    booking.save(validate: false)
  end
end;nil


# for past bookings (make sense ?) - leave it as is

ActiveRecord::Base.logger.level = 1  # disable query logs
bookings = Booking.where('check_out < ?', Time.now).where(guest_check_out_at: nil);nil
bookings.each do |booking|
  booking.guest_check_out_at = booking.check_out.change(hour: 11)
  booking.save(validate: false);nil
end

ok

city = booking&.property&.city
new_value = booking.decorate.check_out.change(hour: 11, min: 0)
booking.guest_check_out_at = city ? city.utc_time(new_value) : new_value