code: func (t *Transaction) ExtractIDsFromFieldIndex(setKey string, destKey string, min interface{}, max interface{}) {
  	t.Script(extractIdsFromFieldIndexScript, redis.Args{setKey, destKey, min, max}, nil)
  }
docs: // ExtractIDsFromFieldIndex is a small function wrapper around a Lua script. The
  // script will get all the ids from the sorted set identified by setKey using
  // ZRANGEBYSCORE with the given min and max, and then store them in a sorted set
  // identified by destKey. The members of the sorted set should be model ids.
  // Note that this method will not work on sorted sets that represents string
  // indexes because they are stored differently.