canvas-lms/db/migrate/20130319120204_add_submission_cached_due_date.rb

class AddSubmissionCachedDueDate < ActiveRecord::Migration
  tag :predeploy

  def self.up
    add_column :submissions, :cached_due_date, :datetime
  end

  def self.down
    remove_column :submissions, :cached_due_date
  end
end