Hibernate exception while saving with cascade=“save-update”

Question

Here is my hbm and test code respectively. I am using Spring\'s HibernateTemplate. I doesn\'t use DAO. Hibernate 2.2.5 with Spring 2.0.7

hbm

<         


        

Answer 1

since instances of the same class are both parents and children, you need an id, which you have, but you also need a parent-id type column in the db (and field on the class) so the children can have a reference to their parent.

See https://forum.hibernate.org/viewtopic.php?f=1&t=1004163