Method ZMembers

tx_zset.go:54–92

ZMembers Returns all the members and scores of members of the set specified by key in a bucket.

(bucket string, key []byte)

// ZMembers Returns all the members and scores of members of the set specified by key in a bucket.
func (tx *Tx) ZMembers(bucket string, key []byte) (map[*SortedSetMember]struct{}, error) {
	if err := tx.ZCheck(bucket); err != nil {
		return nil, err
	}

	b, err := tx.db.bucketMgr.GetBucket(DataStructureSortedSet, bucket)
	if err != nil {
		return nil, err
	}

	var (
		bucketId  = b.Id
		sortedSet *SortedSet
		exist     bool
	)

	if sortedSet, exist = tx.db.Index.SortedSet.exist(bucketId); !exist {
		return nil, ErrBucket
	}

	members, err := sortedSet.ZMembers(string(key))
	if err != nil {
		return nil, err
	}

	res := make(map[*SortedSetMember]struct{})
	for record, score := range members {
		value, err := tx.db.getValueByRecord(record)
		if err != nil {
			return nil, err
		}
		res[&SortedSetMember{
			Value: value,
			Score: float64(score),
		}] = struct{}{}
	}

	return res, nil
}

// ZCard Returns the sorted set cardinality (number of elements) of the sorted set specified by key in a bucket.
func (tx *Tx) ZCard(bucket string, key []byte) (int, error) {