How to give Trigger generated value into Hibernate ValueObject?
hibernate, java, mysql
Solution
ID column must not be null, whatever you do in database driver, will only be trigger before/after insert or any other operation, But according to error it is giving error before any error.
Set something to ID values or try something `@GeneratedValue(strategy = GenerationType.IDENTITY)`
Problem
In my Hibernate Application i'm using create a ValueObject class ``` @Entity @Table(name="user") public class UserVO{ @Id @Column(name="S_ID") private String s_id; @Column(name="FIRSTNAME") private String firstName; @Column(name="LASTNAME") private String lastName; } ``` and in my Service class i'm writing like this ``` public void createOrUpdateUser(UserVO userVO) { userDAO.createOrUpdateUser(userVO); } ``` and in my DAO class i'm writing like this ``` private EntityManager entityManager; public void createOrUpdateUser(UserVO userVO) throws DataAccessException { entityManager.persist(userVO); } ``` now i'm calling createOrUpdateUser(userVO) but it give error ``` Caused by: org.hibernate.id.IdentifierGenerationException: ids for this class must be manually assigned before calling save() ``` Actually my data base i have created one `trigger` for `user` table to generate unique id for `s_id` column is their any problem for trigger..please suggest me..