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Open source

Client.decr(key)

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

Parameters

ParameterTypeDescription
keystringthe key to decrement.

Returns

TypeResolves withRejected 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

JavaScript
JavaScript 
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);

  let value;
  value = await redisClient.incr('mykey');
  value = await redisClient.incrBy('mykey', value);
  value = await redisClient.decrBy('mykey', value);
  value = await redisClient.decr('mykey');

  if (value !== -1) {
    throw new Error('mykey should have been -1');
  }
}