我有一個簡單的類，如下所示：@Entity@Table(name = "post")public class Post {    @Id    @GeneratedValue    Long id;    @Column(name = "title")    String title;    @Formula("(select current_date())")    Date currentDate;    @OneToMany(mappedBy = "post")    Set<PostComment> commentList = new HashSet<>();}并希望在服務(wù)中更新此實體：@Service@Transactionalpublic class PostService {    private final PostRepository postRepository;    public PostService(PostRepository postRepository) {        this.postRepository = postRepository;    }    @Transactional    public Post save(Post entity) {        Post post = postRepository.saveAndFlush(entity);        System.out.println("current_date: " + post.getCurrentDate());        post.getCommentList().forEach(pc -> System.out.println(pc.getReview()));        return post;    }}當(dāng)我檢查休眠日志時，它首先select是Post實體的所有字段，但是當(dāng)我調(diào)用post.getCurrentDate()（用注釋@Formula）時返回null：Hibernate: select post0_.id as id1_0_0_, post0_.title as title2_0_0_, (select current_date()) as formula0_0_ from post post0_ where post0_.id=?Hibernate: update post set title=? where id=?current_date: nullHibernate: select commentlis0_.post_id as post_id3_1_0_, commentlis0_.id as id1_1_0_, commentlis0_.id as id1_1_1_, commentlis0_.post_id as post_id3_1_1_, commentlis0_.review as review2_1_1_ from post_comments commentlis0_ where commentlis0_.post_id=?review為什么返回并記錄commentList但不返回currentDate？是冬蟲嗎？