The keyword 'node redis delete key after time' relates to a common use case where you want to automatically delete certain keys from your Redis database after a certain period of time. This can be useful when you're caching data that becomes obsolete after a specified duration.
In Node.js, we can make use of the
setex() function from the
redis client to set a key to hold a string value and set a timeout on it in seconds.
In this example, we're setting the key 'session' with the value 'active', and it will be automatically deleted after 300 seconds.
One mistake is not considering the TTL (Time-To-Live) value when setting the keys. If keys are set without a TTL, they will persist in Redis until explicitly deleted, which may not be the desired behavior when working with temporary data.
Q: What happens if I try to access a key after it has expired? A: When you try to access a key that has expired, Redis will act as if the key does not exist and return a nil value.