canvas-lms/db/migrate/20140522231727_add_total_activity_time_to_enrollment.rb

class AddTotalActivityTimeToEnrollment < ActiveRecord::Migration
  tag :predeploy

  def self.up
    add_column :enrollments, :total_activity_time, :integer
  end

  def self.down
    remove_column :enrollments, :total_activity_time
  end
end