Код: Выделить всё
@Entity
@Data
@NoArgsConstructor
@AllArgsConstructor
public class Book {
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private int id;
private String name;
@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "book_dtail_id")
private BookDetail bookDetail;
}
@Entity
@Table(name = "book_detail")
@Data
@NoArgsConstructor
@AllArgsConstructor
public class BookDetail {
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
private Integer id;
@Column(name = "number_of_pages")
private Integer numberOfPages;
@OneToOne(mappedBy = "bookDetail")
private Book book;
}
Код: Выделить всё
@Data
@NoArgsConstructor
@AllArgsConstructor
public class BookForm {
Book book;
BookDetail bookDetail;
}
Код: Выделить всё
String handleNewBook(Model model){
Book book = new Book();
BookDetail bookDetail = new BookDetail();
BookForm bookForm = new BookForm(book, bookDetail);
model.addAttribute("bookForm", bookForm);
return "index";
}
String handleSaveBookCreate(BookForm bookForm, Model model){
bookForm.getBook().setBookDetail(bookForm.getBookDetail());
bookForm.getBookDetail().setBook(bookForm.getBook());
bookService.save(bookForm.getBook()));
return "index";
}
Код: Выделить всё
Submit
Код: Выделить всё
java.lang.StackOverflowError: null,
at com.zangland.study.jpa.entity.BookDetail.hashCode(BookDetail.java:17) ~[classes/:na]
at com.zangland.study.jpa.entity.Book.hashCode(Book.java:16) ~[classes/:na]
at com.zangland.study.jpa.entity.BookDetail.hashCode(BookDetail.java:17) ~[classes/:na]
at com.zangland.study.jpa.entity.Book.hashCode(Book.java:16) ~[classes/:na]
Сохраненная книга: '32768','Spring JPA','32768'
Сведения о сохраненной книге: '32768','1157'>
Подробнее здесь: https://stackoverflow.com/questions/349 ... error-null
Мобильная версия