JPA / Hibernate – Mapping One-to-One relationships

  In this tutorial, we will discuss how to map and configure One-to-One relationships in JPA and Hibernate.   What are One-To-One relationships? One to One relationships in databases define the relationship between two different entities, where the first entity can be related to zero or one of the second entity. For example, a user […]

How to manage JPA bidirectional relationships properly

In this troubleshooting guide, we will explore how to properly map bidirectional relationships and common mapping pitfalls that cause exceptions such as DataIntegrityViolationException, a ConstrainViolationException and a PropertyValueException. We will take an unusual approach in this guide by first building the faulty software, and then we will discuss how and why this should be fixed. […]