JPA/Hibernate preUpdate doesn't update parent object

Question

In my application I defined following classes:

@Entity
@Table(name = \"forums\")
public class Forum {
    @Id
    @GeneratedValue(generator = \"system-uuid\"         


        

Answer 1

post.merge() has no use here. post is clearly attached to the session already.

Make sure you've got the content attribute mapped to a column, if it is not, Hibernate has no way of telling if the entity is dirty, and therefore flush the changes to the DB.