Hello i got the following entity class Book: $
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int id;
@OneToOne(cascade=CascadeType.PERSIST)
private BookProfile bookProfile;
@OneToMany(cascade=CascadeType.PERSIST , orphanRemoval=true, fetch=FetchType.EAGER)
private List<Rating> ratings;
$
i try to add a Profile like this:
$
Book book = manager.find(Book.class, bId);
BookProfile bookProfile = new BookProfile();
manager.getTransaction().begin();
book.setBookProfile(bookProfile);
manager.merge(book);
manager.getTransaction().commit();
$
But nothing happens the profile in Book is still null. What am i doing wrong ?
您需要将MERGE
添加到bookProfile
字段的级联类型。
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