java @CreatedBy 如何在 Spring Data JPA 中工作？
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How does @CreatedBy work in Spring Data JPA?
提问by Volodymyr Levytskyi
I used @CreatedDateon entity property and I see that it inserts date into db. I don't understand what is the purpose of @CreatedByannotation in Spring Data JPA.
我@CreatedDate在实体属性上使用过，我看到它将日期插入到数据库中。我不明白@CreatedBySpring Data JPA中注释的目的是什么。
In the reference documentationI read :
在我阅读的参考文档中：
We provide
@CreatedBy,@LastModifiedByto capture the user who created or modified the entity
我们提供
@CreatedBy,@LastModifiedBy以捕获创建或修改实体的用户
But how to create and use such user?
但是如何创建和使用这样的用户呢？
回答by Oliver Drotbohm
If you already made it to the reference documentation, I recommend to read two more paragraphsto find out about and how to use AuditorAware. :)
如果您已经阅读了参考文档，我建议您再阅读两段以了解以及如何使用AuditorAware. :)
回答by user1686407
for TL;DR
对于 TL; DR
your Entity
你的实体
@CreatedBy
private UUID modifyBy;
and your SecurityAuditorAware
和您的 SecurityAuditorAware
@Component
public class SecurityAuditorAware implements AuditorAware<UUID> {
@Override
public Optional<UUID> getCurrentAuditor() {
Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
if (authentication == null || !authentication.isAuthenticated()) {
return Optional.empty();
}
return Optional.of(((MyCustomUser) authentication.getPrincipal()).getId());
}
}
note: you need use the same data type, I use UUID as my custom user id.
注意：您需要使用相同的数据类型，我使用 UUID 作为我的自定义用户 ID。
