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[pkg] go-redis 筆記

基本使用​

建立 client​

// https://ithelp.ithome.com.tw/articles/10249929
func NewClient(ctx context.Context) *redis.Client {
	client := redis.NewClient(&redis.Options{
		Addr:     "localhost:6379",
		Password: "",
		DB:       0,
	})

	pong, err := client.Ping(ctx).Result()
	if err != nil {
		panic(err)
	}

	fmt.Println(pong)
	return client
}

func main() {
  ctx := context.Background()
	client := NewClient(ctx)
}

使用 client 設值​

// https://ithelp.ithome.com.tw/articles/10249929
func main() {
  ctx := context.Background()
	client := NewClient(ctx)
  if err := client.Set(ctx, "key", "value", 0).Err(); err != nil {
		log.Println("client.Set failed", err)
	}
}

使用 client 取值​

// https://ithelp.ithome.com.tw/articles/10249929
func main() {
  ctx := context.Background()
	client := NewClient(ctx)

  // 取值
	val, err := client.Get(ctx, "key").Result()
	if err != nil {
		log.Println("client.Get failed", err)
	}

  // 取值並判斷值是否存在
	val2, err := client.Get(ctx, "key2").Result()
	if err == redis.Nil {
		fmt.Println("val2 does not exist")
	} else if err != nil {
		fmt.Println("client.Get failed", err)
	} else {
		fmt.Println("key2", val2)
	}
}

參考​