How to query Redis db from golang using redigo library

go redis redigo
Daemon1313 picture Daemon1313 · Oct 13, 2014 · Viewed 10.9k times · Source

I am trying to figure out what is the best way to query Redis db for multiple keys in one command. I have seen MGET which can be used for redis-cli. But how you do that using redigo library from GOlang code. Imagine I have an array of keys and I want to take from Redis db all the values for those keys in one query.

Thanks in advance!

Answer

Bayta Darell picture Bayta Darell · Oct 13, 2014

Assuming that c is a Redigo connection and keys is a []string of your keys:

var args []interface{}
for _, k := range keys {
    args = append(args, k)
}
values, err := redis.Strings(c.Do("MGET", args...))
if err != nil {
    // handle error
}
for _, v := range values {
   fmt.Println(v)
}

The Go FAQ explains why you need to copy the keys. The spec describes how to pass a slice to a variadic param.

Related questions

Get All keys From redis in go

How to get all keys of Redis in db and store it in list or array in golang using redigo? redisPool := redis.NewPool(func() (redis.Conn, error) { con, err := redis.Dial("tcp", *redisAddress) con.Do("SELECT", 0) if err != nil { return …

Read More
redigo: getting dial tcp: connect: cannot assign requested address

I have an application that makes about 400 reads per seconds and 100 writes per second to redis (hosted on redislabs). The application is using github.com/garyburd/redigo package as a redis proxy. I have two functions which are the only …

Read More
Go JSON decoding is very slow. What would be a better way to do it?

I am using Go, Revel WAF and Redis. I have to store large json data in Redis (maybe 20MB). json.Unmarshal() takes about roughly 5 seconds. What would be a better way to do it? I tried JsonLib, encode/json, ffjson, …

Read More