gitlab-org--gitlab-foss/db/migrate/20180503193953_add_mirror_a...

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

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    add_column_with_default(:application_settings, :mirror_available, :boolean, default: true, allow_null: false) unless column_exists?(:application_settings, :mirror_available)
  end

  def down
    remove_column(:application_settings, :mirror_available) if column_exists?(:application_settings, :mirror_available)
  end
end
Add version 4.2 to all existing migrations DB schema generated by a migration may look different in rails 4 and 5 (because rails 5 may use different default values). For this reason it's important to explicitly set for which rails version a migration was written for. See https://stackoverflow.com/questions/35929869/activerecordmigration-deprecation-warning-asks-for-rails-version-but-im-no/35930912#35930912 2018-11-13 07:27:31 +00:00			`class AddMirrorAvailableToApplicationSettings < ActiveRecord::Migration[4.2]`
Adds remote mirror table migration 2018-05-03 14:19:21 +00:00			`include Gitlab::Database::MigrationHelpers`

			`DOWNTIME = false`

			`disable_ddl_transaction!`

			`def up`
			`add_column_with_default(:application_settings, :mirror_available, :boolean, default: true, allow_null: false) unless column_exists?(:application_settings, :mirror_available)`
			`end`

			`def down`
			`remove_column(:application_settings, :mirror_available) if column_exists?(:application_settings, :mirror_available)`
			`end`
			`end`