Hibernate version: 2.1

Name and version of the database you are using:MySql 3.23.57

Hello,

I am new to Hibernate and a little confused over how the
relationships work. I have been reading the online docs
and the ebook 'Hibernate in Action' - very good book.

I have two objects Library and Book, Library one-to-many
Book. Each has its own PK(generated using 'native'), with Book
having the Library PK as a FK. If I create the two Objects.

//
Library l = new Library();
l.setName("Java Library");

Book b = new Book();
b.setTitle("Hibernate In Action");

l.addBook(b);

session.save(l);
//

Everything works great the objects are both saved to the
correct tables. However no value is entered into the book
tables FK field.

It is not possible to set this field before the object is saved to
the database because the Library object is only assigned its PK
when saved to the database. I thought (hoped) that hibernate
would take care of this and update the book FK accordingly - asking a lot I know.

So my question is, is this possible. I have tried all combinations of
inverse, cascade using several examples from the web and other
books with no success. Can you please help?

Many Thanks,
Alan.

Read the "Parent/Child Example" chapter in the reference documentation again and follow all steps exactly as described.