How do you test save() operations for Spring-Data JPA Repositories?

Question

I've just started learning JPA and I'm using Spring-Data with Hibernate under the covers. I have everything working it seems, and I'd like to test the underlying database to make sure JPA/Hibernate is doing what I think it should. However, whenever I do a save() to an entity, Hibernate does not update the primary key (which is auto-generated) like basic Hibernate used to. The id is always 0, even though I know the insert statements were successfully generated and likely sent to the database.

How can I get Spring-Data/JPA to update the primary key of an entity when it's saved? I am using AbstractTransactionalJUnit4SpringContextTests.

Answer 1

你必须使用save（）操作的返回值

person = repo.save(person);