Hibernate @GeneratedValue null error for primary key

Question

I am using Hibernate to save an object in the database. I am generating my primary key with @GeneratedValue annotation.

Here is my code Vendor class

Answer 1

I don't know if the Hibernate ORM has been updated that much but currently you have to omit the decorator @Column() if you use @GeneratedValue.

So your code will be

@Id
@GeneratedValue
private int vendor_ID;

instead of

@Id
@GeneratedValue(strategy = javax.persistence.GenerationType.IDENTITY)
@Column(name="vendor_ID", unique = true, nullable = false)
private int vendor_ID;

Hope it helps.