db/migrate/20180503150427_add_index_to_namespaces_runners_token.rb


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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.

class AddIndexToNamespacesRunnersToken < ActiveRecord::Migration
  include Gitlab::Database::MigrationHelpers

  DOWNTIME = false

  disable_ddl_transaction!

  def up
    add_concurrent_index :namespaces, :runners_token, unique: true
  end

  def down
    if index_exists?(:namespaces, :runners_token, unique: true)
      remove_index :namespaces, :runners_token
    end
  end
end