debian-mirror-gitlab/db/migrate/20180529093006_ensure_remote_mirror_columns.rb

class EnsureRemoteMirrorColumns < ActiveRecord::Migration[4.2]
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    # rubocop:disable Migration/Datetime
    add_column :remote_mirrors, :last_update_started_at, :datetime unless column_exists?(:remote_mirrors, :last_update_started_at)
    add_column :remote_mirrors, :remote_name, :string unless column_exists?(:remote_mirrors, :remote_name) # rubocop:disable Migration/AddLimitToStringColumns

    unless column_exists?(:remote_mirrors, :only_protected_branches)
      add_column_with_default(:remote_mirrors,
                              :only_protected_branches,
                              :boolean,
                              default: false,
                              allow_null: false)
    end
  end

  def down
    # db/migrate/20180503131624_create_remote_mirrors.rb will remove the table
  end
end