This code
{code:java}
// Some comments here
Map<String, Object> hints = new HashMap<>();
hints.put(QueryHints.HINT_READONLY, true);
Pupil pupil = em.find(Pupil.class, pupilId, hints);//bug diry checking is on is spite of HINT_READONLY = true
pupil.setAge(newAge);
{code}
does not turn off dirty checking.
However this works as intended
{code:java}
CriteriaBuilder criteriaBuilder = entityManager.getCriteriaBuilder();
CriteriaQuery<Pupil> query = criteriaBuilder.createQuery(Pupil.class);
Root<Pupil> from = query.from(Pupil.class);
Predicate predicate = criteriaBuilder.equal(from.get(Pupil_.id), id);
query = query.select(from).where(predicate);
Pupil pupil = entityManager.createQuery(query)
.setHint(QueryHints.HINT_READONLY, readOnly)
.getSingleResult();
{code}
To check it download sample project [https://github.com/stsypanov/spring-data-examples|https://github.com/stsypanov/spring-data-examples] and run *BaseJpaRepositoryImplFindOneReadOnlyTest.testFindOneReadOnlyTrue_useEntityManager_expectValueNotUpdated* |
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