# I want to replace this code to make only 1 any_of() call.
  if params["group_id"]
    threads = threads.any_of(
      {:group_id => params[:group_id].to_i},
      {:group_id.exists => false},
    )
  end
  if params["group_ids"]
    threads = threads.any_of(
      {:group_id.in => params["group_ids"].split(",").map(&:to_i)},
      {:group_id.exists => false},
    )
  end

def handle_threads_query(comment_threads)
.....