HRANDFIELD command is useful when you want to get one or multiple random fields from a hash stored in Redis.
Here's an example of using
HRANDFIELD in Python:
In this case, let's assume we have a hash named "student:1" and we want to fetch one random field from it.
And if you need to fetch multiple random fields (for example three), you can do it like this:
hrandfield, as it will return None if the hash doesn't exist.
One common mistake to avoid is expecting
hrandfield to return unique fields when requested for multiple fields.
hrandfield may return the same field more than once when asked for multiple fields.
Q: If I request more fields than the hash has, will
hrandfield return duplicates?
hrandfield can return duplicates if you request more fields than are available in the existing hash.
Q: Does calling
hrandfield remove the field from the hash?
hrandfield does not remove the field from the hash. It just retrieves it.