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[jboss-user] [Persistence, JBoss/CMP, Hibernate,
 Database] - OnetoMany - cascade all

manik.surtani@jboss.com

2007-12-30


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Hey,

I think I have a very basic confusion regarding cascade,
I have the following simple relationship:


| public class message {
|
| private Set<Comment> comments;
|
| @OneToMany(mappedBy = "message", fetch = FetchType.EAGER, cascade = CascadeType.ALL)
| public Set<MessageComment> getComments() {
|  return comments;
| }
|
| //set...
| }
|


And

| private Message message;
|
| @ManyToOne(optional=false)
| public Message getMessage() {
| return message;
| }
|
| //setter
|


I'm trying to persist a new comment by:


| //assuming a message with id 1 exists in db
| Message m = entityManager.find(Message.class,new Long(1));
| Comment c = new Comment();
| c.setMessage(m);
| m.getComments.add(c);
| entityManager.merge(m);
|


I don't want to persist the comment directly but through the message,

if 'getComments' is cascaded with ALL, shouldn't the new comments get persisted when em.merge(m) is invoked?




Thanks,

Asaf.

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