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Error 363 - Failed to read value of inverse relationship

) {         EntityTransaction tr = db.getTransaction();         try {             tr.begin();             db

Method Invocation On All Entities

part: em = emf.createEntityManager(); EntityTransaction trans = em.getTransaction(); trans

Cascading merge() leading to "Attempt to persist a reference to a non managed instance" error

");     EntityManager em = emf.createEntityManager();     EntityTransaction tx = em.getTransaction

How to delete M2M relationship?

, Timeslot ts) { EntityTransaction transaction = em.getTransaction(); try

failure to enforce NOT NULL for java.lang.String

(); EntityTransaction tr = em.getTransaction(); Request r = new Request(); r.setUsername(null

"Attempt to lock a non entity object" error

JDO Transaction, and then beginTransaction(), lock(), and rollback() on a JPA EntityTransaction

zip file or JAR manifest missing

operation. public class PageTest { protected static EntityTransaction trans = SingleManager.getTrans

Getting Started

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Prior knowledge or experience in database programming (SQL, JDBC, ORM, JPA, etc.) is not required, but some background in using the Java language is essential.

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