feat: 增加空缓存实现的支持

redis.go

@@ -9,21 +9,19 @@ package cache
 
 import (
 	"context"
+	"errors"
 
 	cacheAbstract "git.zhangdeman.cn/zhangdeman/cache/abstract"
 	"git.zhangdeman.cn/zhangdeman/redis"
 	"git.zhangdeman.cn/zhangdeman/wrapper/op_string"
+	redisClient "github.com/redis/go-redis/v9"
 )
 
 var (
-	RedisClient = &Redis{}
+	RedisClient cacheAbstract.ICache = &Redis{}
 )
 
 // Redis 基于redis缓存
-//
-// Author : go_developer@163.com<白茶清欢>
-//
-// Date : 14:19 2023/3/21
 type Redis struct {
 }
 
@@ -33,6 +31,10 @@ func (r *Redis) Exist(ctx context.Context, instanceFlag string, key string) (boo
 		ctx = context.Background()
 	}
 	res := redis.Wrapper.Exist(ctx, instanceFlag, key)
+	if nil != res.Err && errors.Is(res.Err, redisClient.Nil) {
+		// 未查询到数据, 也是数据不存在
+		return false, nil
+	}
 	return res.Result == "1", res.Err
 }