persist Archives - IT Nursery

PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate

I have a JPA-persisted object model that contains a many-to-one relationship: an Account has many Transactions. A Transaction has one Account. Here’s a … Read more

JPA EntityManager: Why use persist() over merge()?

by IT Nursery

EntityManager.merge() can insert new objects and update existing ones. Why would one want to use persist() (which can only create new objects)? 15 … Read more

PersistentObjectException: detached entity passed to persist thrown by JPA and Hibernate

by IT Nursery

This is a typical bidirectional consistency problem. It is well discussed in this link as well as this link. As per the articles … Read more