go-redisでIncr

package main


import (
        "fmt"
        "strconv"
        "time"
        "github.com/go-redis/redis"
)

func getRedisClient() (*redis.Client) {
        client := redis.NewClient(&redis.Options{
                Addr:     "localhost:6379",
                Password: "", // no password set
                DB:       0,  // use default DB
        })  
        return client
}

func check(key string) {
        rc := getRedisClient()
        v := rc.Incr(key)
        fmt.Printf("key:%v,v(%d):%v,%v\n", key, v.Val(), v.Err(), v.Val())

        if v.Err() != nil {
                fmt.Print("error is not nil\n")
        }   
        if v.Err() == redis.Nil {
                fmt.Print("redis.Nil is coming\n")
        }   
}

func main() {
        ts := strconv.Itoa(int(time.Now().Unix()))
        key := "thekey:"+ts
        check(key)
        check(key)
}

$ go run main.go
key:thekey:1584105149,v(1):<nil>,1
key:thekey:1584105149,v(2):<nil>,2