Iterate a list of table names and generate a migration file to add the lock_version column to each

generate_lock_version_migrations.rb

[].each do |table|
  time = Time.now.strftime("%Y%m%d%H%M%S")
  filename = "#{time}_add_lock_version_to_#{table}.rb"
  File.open(filename, 'w') do |file|
    file.puts("class AddLockVersionTo#{table.camelize} < ActiveRecord::Migration[5.2]")
    file.puts("  def change")
    file.puts("    add_column :#{table}, :lock_version, :integer, default: 0")
    file.puts("  end")
    file.puts("end")
  end
  sleep(1.second)
end