Spring data JPA only one composite key is auto incremented issue

Question

I am using MySQL database.

In my table i there are two four primary keys, out of which one is auto incremented.

@Embeddable
    public class Employee         


        

Answer 1

You're missing a @GeneratedValue at the id field. Depending on its values, you're free to choose a strategy for generation, like a sequences, id tables, an automatic internal id generation. Last but not least GenerationType.AUTO will choose one of the mentioned strategies. See the Javadocs for javax.persistence.GeneratedValue and javax.persistence.GenerationType.