Spring Data Redis - UUID id - ConverterNotFoundException [英] Spring Data Redis - UUID id - ConverterNotFoundException

问题描述

我想使用 UUID 键将我的实体存储在 Redis 中:

I would like to store my entities in Redis with a UUID key:

@RedisHash("order")
public class Order {

    @Id
    private UUID id;

    ...
}

但是，此设置出现以下异常:

However, I get the following exception with this setup:

org.springframework.core.convert.ConverterNotFoundException: No converter found capable of converting from type [java.util.UUID] to type [byte[]]
at org.springframework.core.convert.support.GenericConversionService.handleConverterNotFound(GenericConversionService.java:321) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:194) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.core.convert.support.GenericConversionService.convert(GenericConversionService.java:174) ~[spring-core-5.0.5.RELEASE.jar:5.0.5.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.toBytes(MappingRedisConverter.java:948) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.lambda$writeInternal$2(MappingRedisConverter.java:592) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.mapping.model.BasicPersistentEntity.doWithProperties(BasicPersistentEntity.java:328) ~[spring-data-commons-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.writeInternal(MappingRedisConverter.java:584) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:396) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.convert.MappingRedisConverter.write(MappingRedisConverter.java:122) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.redis.core.RedisKeyValueAdapter.put(RedisKeyValueAdapter.java:208) ~[spring-data-redis-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.lambda$update$1(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.execute(KeyValueTemplate.java:343) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.core.KeyValueTemplate.update(KeyValueTemplate.java:204) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
at org.springframework.data.keyvalue.repository.support.SimpleKeyValueRepository.save(SimpleKeyValueRepository.java:103) ~[spring-data-keyvalue-2.0.6.RELEASE.jar:2.0.6.RELEASE]
...

当使用 String 而不是 UUID 时，不会出现此类异常.

When using String instead of UUID, no such exception appears.

如何使用 UUID 作为 ID 类型?

How can I use UUID as ID type?

推荐答案

更准确地说，您必须在您的上下文中注册一个名为 redisCustomConversions 的 CustomConversion bean.请参阅此帖子:Redis - 如何配置自定义转换

To be more precise you have to register a CustomConversion bean in your context with the name redisCustomConversions. See this post: Redis - How to configure custom conversions

所以在你的情况下它会像

So in your case it would be something like

@Bean
public CustomConversion redisCustomConversions(){
    return new CustomConversions(
        Arrays.asList(new UUIDToStringConverter(), new StringToUUIDConverter()))))
}

原文:

我认为解决这个问题的最简单方法是为 uuid 编写一个类型转换器.像一个

I think the easiest way to fix this is to write a type converter for uuid. Something like a

class UUIDConverter 实现 Converter

或在需要时

class UUIDConverter 实现 Converter

您必须在您的上下文中将其注册为 bean.

You have to register this as a bean in your context.

这篇关于Spring Data Redis - UUID id - ConverterNotFoundException的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！