ServiceStack Redis 客户端中带有验证的事务性创建 [英] Transactional Create with Validation in ServiceStack Redis Client

问题描述

User 有 DisplayName，它对用户来说是唯一的.

User has DisplayName and it is unique for Users.

我想创建用户，但首先我必须检查显示名称(用户不能重复显示名称)

I want to Create User but firstly I have to check display name (DisplayName could not be duplicated for Users)

我检查了 ServiceStack 示例，但看不到带有验证检查的事务性插入/更新.

I've checked ServiceStack examples and I could not see Transactional Insert/Update with validation check.

我该如何执行.我不想为 redis db 编写验证任务".我不想在 db 中出现不一致.

How can I perform it. I dont want to write "Validation Tasks" for redis db. I dont want inconsistency in db.

推荐答案

ServiceStack.Redis 客户端确实支持 Redis 的 WATCH 和 transactions 其中这些 Redis 命令:

The ServiceStack.Redis client does have support for Redis's WATCH and transactions where these Redis commands:

WATCH mykey
test = EXIST mykey
MULTI
SET mykey $val
EXEC

可以通过以下方式完成:

Can be accomplished with:

var redis = new RedisClient();
redis.Watch("mykey");
if (!redis.ContainsKey("mykey")) return;

using (var trans = redis.CreateTransaction()) {
    trans.QueueCommand(r => r.Set("mykey", "val"));
    trans.Commit();
}

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