module PgSearch

def disable_multisearch
  Thread.current["PgSearch.enable_multisearch"] = false
  yield
ensure
  Thread.current["PgSearch.enable_multisearch"] = true
end

def method_missing(symbol, *args)
  case symbol
  when :pg_search_rank
    raise PgSearchRankNotSelected.new unless respond_to?(:pg_search_rank)
    read_attribute(:pg_search_rank).to_f
  else
    super
  end
end

def multisearch(*args)
  PgSearch::Document.search(*args)
end

def multisearch_enabled?
  if Thread.current.key?("PgSearch.enable_multisearch")
    Thread.current["PgSearch.enable_multisearch"]
  else
    true
  end
end

def respond_to_missing?(symbol, *args)
  case symbol
  when :pg_search_rank
    attributes.key?(:pg_search_rank)
  else
    super
  end
end