Cannot get value as []byte from MGet

[lumacielz]

When trying to get the values saved as []byte in cache using MGet, the interface value returned has the concrete type string instead of []byte. Why does this happen???

Expected Behavior

var redis = libredis.NewClient(myCfg)

func batch_set(ctx context.Context, keyValues map[string]any, expiration time.Duration) error{
	cmds := make(map[string]*libredis.StatusCmd)
	
	for key, value := range keyValues {
		packed, err := msgpack.Marshal(value)
		if err != nil {
			return err
		}

		cmds[key] = pipe.Set(ctx, key, packed, expiration)
	}

	_, err := pipe.Exec(ctx)
	if err != nil {
		return err
	}
	
	return nil
}

func batch_get(ctx context.Context, keys []string)error {
	myValues := c.redis.MGet(ctx, keys...).Val()
	for i := range values {
		if values[i] == nil {
			continue
		}

		bytesValue, ok := values[i].([]byte)    //Expected to work 
		if !ok {
			return errors.New("error reading!")
		}

                myFunc((bytesValue)
	
	return nil
}

Possible Solution

var redis = libredis.NewClient(myCfg)

func batch_set(ctx context.Context, keyValues map[string]any, expiration time.Duration) error{
	cmds := make(map[string]*libredis.StatusCmd)
	
	for key, value := range keyValues {
		packed, err := msgpack.Marshal(value)
		if err != nil {
			return err
		}

		cmds[key] = pipe.Set(ctx, key, packed, expiration)
	}

	_, err := pipe.Exec(ctx)
	if err != nil {
		return err
	}
	
	return nil
}

func batch_get(ctx context.Context, keys []string)error {
	myValues := c.redis.MGet(ctx, keys...).Val()
	for i := range values {
		if values[i] == nil {
			continue
		}

		bytesValue  := []byte(values[i].(string))    //This works
		
                myFunc((bytesValue)
	
	 return nil
}