Primary-key @OneToOne mapping in Hibernate
18-May-2011
2 minutes read

Today was trying to join two tables using its Primary keys using Hibernate. Here is what I tried to do:

@Table(name = "customer") @Entity public class Customer { @Id @OneToOne @JoinColumn(name = "customer\_id", updatable = false) private Credentials credentials; }

I was constantly getting an error stating invalid column name. Later then I realized that its not possible have Join in the Primary-Key and bind to a custom object. This forced me to have a Auto-generated Id as a key to the table and named it as the primary key. This is how my code looked after modification.

@Table(name = "customer") @Entity public class Customer { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private long id; @OneToOne @JoinColumn(name = "customer\_id",updatable = false) private Credentials credentials; }
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Prasanna is a full stack web developer, with exposure to various programming languages. Uses mostly Java, Javascript these days and got ~13 years of architecting and coding enterprise software solutions.