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Client.exists(keys)

Returns the number of key arguments that exist. Note that if the same existing key is mentioned in the argument multiple times, it will be counted multiple times.

Parameters

ParameterTypeDescription
keysstring[]the keys to check the existence of.

Returns

TypeResolves withRejected when
Promise<number>On success, the promise resolves with the number of keys that exist from those specified as arguments.

Example

import redis from 'k6/experimental/redis';
// Get the redis instance(s) address and password from the environment
const redis_addrs = __ENV.REDIS_ADDRS || '';
const redis_password = __ENV.REDIS_PASSWORD || '';
// Instantiate a new redis client
const redisClient = new redis.Client({
addrs: redis_addrs.split(',') || new Array('localhost:6379'), // in the form of 'host:port', separated by commas
password: redis_password,
});
export default function () {
redisClient
.set('mykey', 'myvalue', 0)
.then((_) => redisClient.exists('mykey'))
.then((exists) => {
if (exists === false) {
throw new Error('mykey should exist');
}
return redisClient.get('mykey');
})
.then((value) => console.log(`set key 'mykey' to value: ${value}`))
.then(() => redisClient.del('mykey'));
}