SMISMEMBER - Upstash Documentation

Use SMISMEMBER to check several values for membership in a set in one call.

The reply holds one 1 or 0 per value, in the order given, so it lines up with your input list. A missing key yields all zeros rather than an error. It replaces a series of SISMEMBER round trips, which matters when checking a batch of ids against a blocklist or an entitlement set.

Syntax#

SMISMEMBER <key> <member> [<member> ...]

Arguments#

Argument	Required	Repeatable	Description
`<key>`	Yes	No	Redis key targeted by the command.
`<member>`	Yes	Yes	Member name.

Response#

The reply reports the result of the operation. Error replies have the same shape in RESP2 and RESP3 and are surfaced as exceptions by the SDKs below.

Protocol	Reply
RESP2	Array of integers, one per queried member
RESP3	Array of integers, one per queried member

Note

Client libraries often decode bulk strings, maps, sets, and numeric strings into language-native values. The table describes the Redis wire reply.

Examples#

TCP examples use the TLS REDIS_URL from the Upstash console. REST examples use UPSTASH_REDIS_REST_URL and UPSTASH_REDIS_REST_TOKEN.

Redis CLI

SMISMEMBER my-key member

@upstash/redis

import { Redis } from "@upstash/redis";const redis = Redis.fromEnv();await redis.sadd("set", "a", "b", "c");const members =  await redis.smismember("set", ["a", "b", "d"]);console.log(members); // [1, 1, 0]

upstash_redis

from upstash_redis import Redisredis = Redis.from_env()result = redis.smismember("my-key", "member")print(result)

ioredis

import Redis from "ioredis";const redis = new Redis(process.env.REDIS_URL!);const result = await redis.smismember("my-key", "member");console.log(result);

node-redis

import { createClient } from "redis";const client = await createClient({ url: process.env.REDIS_URL })  .on("error", console.error)  .connect();const result = await client.smIsMember("my-key", ["member"]);console.log(result);

redis-py

import osimport redisclient = redis.from_url(os.environ["REDIS_URL"])result = client.smismember("my-key", ["member"])print(result)

go-redis

package mainimport (    "context"    "fmt"    "os"    "github.com/redis/go-redis/v9")func main() {    opts, err := redis.ParseURL(os.Getenv("REDIS_URL"))    if err != nil {        panic(err)    }    client := redis.NewClient(opts)    result, err := client.SMIsMember(context.Background(), "my-key", "member").Result()    if err != nil {        panic(err)    }    fmt.Println(result)}

jedis

import java.net.URI;import redis.clients.jedis.Jedis;try (Jedis jedis = new Jedis(new URI(System.getenv("REDIS_URL")))) {  Object result = jedis.smismember("my-key", "member");  System.out.println(result);}

redis-rs

use redis::TypedCommands;fn main() -> redis::RedisResult<()> {    let url = std::env::var("REDIS_URL").expect("REDIS_URL is not set");    let client = redis::Client::open(url)?;    let mut connection = client.get_connection()?;    let result = connection.smismember("my-key", &["member"])?;    println!("{result:?}");    Ok(())}