JPA with JTA: Persist entity and merge cascaded child entities

Question

I have a bidirectional one-to-many relationship with the following entity classes:

0 or 1 client <-> 0 or more product orders

When persis

Answer 1

Use @Joincolumn annotation in your ProductOrder entity, please see below.

   @Entity
   public class ProductOrder implements Serializable, ChildEntity {
   private static final long serialVersionUID = 1L;

   @Id
   @GeneratedValue(strategy = GenerationType.AUTO)
   private Long id;

   @ManyToOne // owning side
   @JoinColumn(name = "PRODUCTORDER_ID", referencedColumnName = "ID")
   //write your database column names into name and referencedColumnName attributes.
   private Client client;

   // other fields, getters and setters
   }