redmine/db/migrate/20091017213113_add_missing_indexes_to_enumerations.rb

class AddMissingIndexesToEnumerations < ActiveRecord::Migration[4.2]
  def self.up
    add_index :enumerations, [:id, :type]
  end

  def self.down
    remove_index :enumerations, :column => [:id, :type]
  end
end