class CreateDeviceLogHistories < ActiveRecord::Migration[6.0]
  def change
    create_table :device_log_histories do |t|
      t.references :device_log
      t.string :mac, limit: 12, null: false, index: true
      t.datetime :hwtime
      t.datetime :sys_time
      t.string :request_ip

      t.datetime :created_at, null: false
    end
  end
end