canvas-lms/db/migrate/20130416190214_add_validation_token_to_quiz_submissions.rb

class AddValidationTokenToQuizSubmissions < ActiveRecord::Migration
  tag :predeploy

  def self.up
    add_column :quiz_submissions, :validation_token, :string
  end

  def self.down
    remove_column :quiz_submissions, :validation_token
  end
end