在 Hibernate Envers 中获取先前版本的实体 [英] Get previous version of entity in Hibernate Envers

问题描述

我有一个由 Hibernate 加载的实体(通过 EntityManager):

I have an entity loaded by Hibernate (via EntityManager):

User u = em.load(User.class, id)

该类由 Hibernate Envers 审核.如何加载以前版本的 User 实体?

This class is audited by Hibernate Envers. How can I load the previous version of a User entity?

推荐答案

也许这个(来自 AuditReader 文档)

maybe this then (from AuditReader docs)

AuditReader reader = AuditReaderFactory.get(entityManager);
User user_rev1 = reader.find(User.class, user.getId(), 1);

List<Number> revNumbers = reader.getRevisions(User.class, user_rev1);
User user_previous = reader.find(User.class, user_rev1.getId(),
  revNumbers.get(revNumbers.size()-1));

(我对此很陌生，不确定我的所有语法是否正确，也许 size()-1 应该是 size()-2?)

(I'm very new to this, not sure if I have all the syntax right, maybe the size()-1 should be size()-2?)

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