Hibernate验证器@Size在分层列表级联

Question

我正在编辑作者实体，为作者插入新书和为书籍添加新评论。我在书籍和评论列表中添加了@Size验证。当我合并作者实体时，@ Size验证适用于书籍，但在我的评论列表中出现错误。即使这个列表有价值，对于休眠它也是空的。 This is my code。 为什么@Size不能在第二个级联列表中工作？

public class Author {
    @OneToMany(mappedBy = "author", cascade = CascadeType.ALL, orphanRemoval = true)
    private List<Book> books = new ArrayList<>();
}

public class Book {
    @ManyToOne
    @JoinColumn(name = "AUTHOR_ID")
    private Author author;

    @Size(min = 1, message = "At least one review")
    @OneToMany(mappedBy = "book", cascade = CascadeType.ALL, orphanRemoval = true)
    private List<Review> reviews = new ArrayList<>();
}

public class Review {
    @ManyToOne
    @JoinColumn(name = "BOOK_ID")
    private Book book;
}

public class AuthorController {    
    @RequestMapping(method = RequestMethod.PUT)
    public void update() {
        Author author = new Author();
        author.setName("Kathy Sierra");

        author = repository.save(author);

        Book book = new Book();
        book.setAuthor(author);
        book.setTitle("Head First Java");
        author.getBooks().add(book);

        Review review = new Review();
        review.setDescription("It's fast, irreverent, fun and engaging!");
        review.setBook(book);

        book.getReviews().add(review);

        repository.save(author);
    }
}

显示的错误是：

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is javax.validation.ConstraintViolationException: Validation failed for classes [com.example.demo.model.Author] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='At least one review', propertyPath=books, rootBeanClass=class com.example.demo.model.Author, messageTemplate='At least one review'}
]] with root cause

javax.validation.ConstraintViolationException: Validation failed for classes [com.example.demo.model.Author] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
    ConstraintViolationImpl{interpolatedMessage='At least one review', propertyPath=books, rootBeanClass=class com.example.demo.model.Author, messageTemplate='At least one review'}
]

感谢您的帮助！