无法添加记录，Java，休眠

Question

I have table with data. for instance I have table user_books.

id_user | id_book

I am receiving each request all set of books that tied to current user. (1, 2), (1, 7) So I delete all record from user_books for current user and reinsert them.

And problem is I keep getting errors from Hibernate, removal successful but I can reinsert them because of this warnings.

2013-04-18 15:48:40,787 INFO : org.hibernate.event.internal.DefaultDeleteEventListener - HHH000114: Handling transient entity in delete processing
2013-04-18 15:48:40,788 INFO : org.hibernate.event.internal.DefaultDeleteEventListener - HHH000114: Handling transient entity in delete processing
2013-04-18 15:48:40,788 INFO : org.hibernate.event.internal.DefaultDeleteEventListener - HHH000114: Handling transient entity in delete processing

Any idea where to look? Why I cant reinsert books with userBook.add( ... ) in Java Hibernate environment ?

Answer 1

Probably this arise due not correct your persistent object annotation. I guess it's connect to annotation of your filed and Cascade Type.

Try something like this:

@ManyToMany(fetch = FetchType.EAGER, cascade=CascadeType.PERSIST)

Answer 2

I think Mapping relationship is not defind properly So you must defind mapping relationship in your POJO.hbm.xml class

Try as below,

<many-to-one class="VO.regVO" name="uid" cascade="delete"></many-to-one>

here many-to-one relationship is defind with mapping the regVO POJO class Primarykey 'uid' is now for this current POJO class is work as Foreignkey and cascade 'delete' will about deletion of one object from the database causing deletion of other (dependent) objects