Hibernate comes with many additions to the standard JPA specification. One such example is the
@GeneratorType annotation which allows you to customize the way a given entity property value is automatically generated.
If you’re using Spring Data, you can simply use the
@LastModifiedBy annotations and the annotated entity properties are going to be populated with the currently logged user.
If you’re not using Spring Data, then you can easily emulate the same behavior using the Hibernate-specific
@GeneratorType annotation and the
ValueGenerator callback mechanism.
Continue reading “How to emulate @CreatedBy and @LastModifiedBy from Spring Data using the @GeneratorType Hibernate annotation”
As I explained in this free chapter of my book, Hibernate offers many benefits over standard JPA. One such example is the
In this article, you are going to see what is the best way to map a natural business key when using Hibernate.
Continue reading “The best way to map a @NaturalId business key with JPA and Hibernate”
Recently, I got a very good question on Twitter, and I decided that the best way to answer it is with a new article.
In this article, we are going to see how various ways to map an Enum using JPA and Hibernate.
Continue reading “The best way to map an Enum Type with JPA and Hibernate”
Mapping entities to database tables is usually a very straightforward process. However, if your mappings are rather unusual, you might bump into some rare issues like this one I found on the Hibernate forum.
In this article, I’m going to explain the mapping between Java objects to JDBC and database column types, and how you can fix the issue described in the aforementioned Hibernate question.
Continue reading “How to fix “wrong column type encountered” schema-validation errors with JPA and Hibernate”
Today, I stumbled upon a StackOverflow answer that I gave some time ago and realized that it deserves a post of its own.
As previously explained, the
@JoinFormula is a very awesome annotation which allows you to customize the way you join entities beyond JPA
Continue reading “How to map the latest child of a parent entity using Hibernate @JoinFormula”