HMGET command in Redis is used to retrieve the value of one or more fields stored in a hash. Common use cases for this command include:
To interact with Redis in Go, we'll use the
go-redis package. This can be installed using
go get github.com/go-redis/redis.
Here's an example of setting and getting multiple fields using
In this example, we first create a new Redis client connected to localhost on port 6379. We then set two fields ("field1" and "field2") in the hash at "hashkey" using the
HMSet function. Later, we retrieve the values of "field1" and "field2" using the
HMGet, don't ignore them.
HMGetwhen you need to fetch multiple fields from a hash at once as it's more efficient than calling
HMGet. If the key does not exist or is associated with a non-hash data type, an error will be returned.
HMGetwill return a
nilvalue for that field.
Q: What happens if the hash or the fields do not exist?
A: If the hash does not exist,
HMGet will return an empty list. If a field does not exist,
HMGet will include a
nil value in its output for that field.