module PgSearch::Multisearchable

def self.included(mod)
  mod.class_eval do
    has_one :pg_search_document,
            as: :searchable,
            class_name: "PgSearch::Document",
            dependent: :delete
    after_save :update_pg_search_document,
               if: -> { PgSearch.multisearch_enabled? }
  end
end