Determines whether a field exists in a hash.
HEXISTS
key field
Returns if field
is an existing field in the hash stored
at key
.
One of the following:
Integer reply:
0
if the hash does not contain the field, or the key does
not exist.
Integer reply:
1
if the hash contains the field.
O(1)
@fast @hash @read
127.0.0.1:6379> HSET myhash field1 "foo"
(integer) 1
127.0.0.1:6379> HEXISTS myhash field1
(integer) 1
127.0.0.1:6379> HEXISTS myhash field2
(integer) 0
HDEL, HGET, HGETALL, HINCRBY, HINCRBYFLOAT, HKEYS, HLEN, HMGET, HRANDFIELD, HSCAN, HSET, HSETNX, HSTRLEN, HVALS.