org.hibernate.PersistentObjectException: detached entity passed to persist exception

Question

I\'m creating a simple app to just insert a row to a table (if table does not exist, create it) using Java JPA.

I\'m attaching some code for a runnable exam

Answer 1

You can use this contrustor like this:

Person p = new Person(0, "Peter", "Parker");

then when JPA persist to database it'll automatically insert with AUTO_INCREMENT strategy.