Client.decrBy(key, decrement)

Decrements the number stored at key by decrement. If the key does not exist, it is set to zero before performing the operation.

Parameters

Parameter	Type	Description
`key`	string	the key to decrement.
`decrement`	number	the amount to decrement by

Returns

Type	Resolves with	Rejected when
`Promise<number>`	On success, the promise resolves with the value of `key` after the decrement.	If the key contains a value of the wrong type, or contains a string that cannot be represented as an integer, the promise is rejected with an error.

Example

import redis from 'k6/experimental/redis';

// Instantiate a new redis client
const redisClient = new redis.Client('redis://localhost:6379');

export default async function () {
  await redisClient.set('mykey', 10, 0);

  const value = await redisClient.decrBy('mykey', 2);
  if (value !== 8) {
    throw new Error('mykey should have been 8');
  }
}