在Hibernate Envers中获取以前版本的实体 [英] Get previous version of entity in Hibernate Envers
本文介绍了在Hibernate Envers中获取以前版本的实体的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个由Hibernate加载的实体(通过 EntityManager
):
User u = em.load(User.class,id)
这个类由Hibernate审计Envers。我怎么能加载用户实体的以前版本? 可能这个(从 AuditReader 文档)
AuditReader reader = AuditReaderFactory.get(entityManager);
User user_rev1 = reader.find(User.class,user.getId(),1);
列表<号码> revNumbers = reader.getRevisions(User.class,user_rev1);
User user_previous = reader.find(User.class,user_rev1.getId(),
revNumbers.get(revNumbers.size() - 1));
(我对此非常陌生,不知道我是否拥有所有的语法,也许是size() - 1应该是size() - 2?)
I have an entity loaded by Hibernate (via EntityManager
):
User u = em.load(User.class, id)
This class is audited by Hibernate Envers. How can I load the previous version of a User entity?
解决方案
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));
(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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