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

If you use the strategy javax.persistence.GenerationType.IDENTITY for @GeneratedValue your table must have an identity generator. This can be done including an AUTO_INCREMENT to your primary key.

Example: CREATE TABLE Vendor ( ID int NOT NULL AUTO_INCREMENT, PRIMARY KEY (ID) )