ByThorben JanssenSome table models don’t enforce their foreign key references by a foreign key constraint. This is a bad practice that often leads to foreign key references that point to non-existing records. When Hibernate tries to resolve such a broken reference, it throws an EntityNotFoundException. You should, therefore, define a foreign key constraint for every foreign…
ByThorben JanssenIf you tried Hibernate 6, you might have recognized the new @Incubating annotation. The Hibernate team introduces it to tell users about new APIs and interfaces that might still change. That’s a great addition because most developers expect new APIs and features to be stable after they are part of a final release. In general, that…
ByThorben JanssenHibernate implements JPA’s standardized constructor expressions and @SqlResultSetMappings to map the results of your queries. And it also supports proprietary ResultTransformers. They provide a powerful and flexible way to map the result of your JPQL, Criteria, and native SQL query to a specific object structure. This can be entity or DTO objects, java.util.List or java.util.Map…
ByThorben JanssenBased on its javadoc, a java.util.List is supposed to represent an ordered collection of values. But that’s not necessarily the case if you use it as the type of a to-many association or an ElementCollection. As I explained before, Hibernate can handle a java.util.List as a Bag or a List. Only the List mapping persists the order…
ByThorben JanssenOne of the smaller changes in Hibernate 6 that can easily get overlooked, which Steve Ebersole presented in a recent Expert Session in the Persistence Hub, is the introduction of the MutationQuery and SelectionQuery interfaces. It allows the separation between queries that change data and the ones that select it from the database. Older Hibernate…