inheritance hibernate annotations example

Inheritance hibernate annotations example code#

A publication can either be a book or a blog post. It consists of an author who has written different kinds of publications. A teacher can give multiple courses, but a course is given by only one teacher (that's the Many-to-One perspective - many courses to one teacher).Īnother example could be on social media - a photo can have many comments, but each of those comments belongs to that one photo. Single Table Joined Choosing a Strategy Domain Model I will use the same simple domain model in all of the examples to show you the different inheritance strategies. In our example, this would be a Teacher and their Courses. You could go ahead and say that they're the opposite sides of the same coin.Īs its name implies, it's a relationship that links one entity to many other entities. We'll get started with the One-to-Many and Many-to-One relationships, which are closely related. Let's tackle these relationships one by one. The idea was to map the model of a school with students taking courses given by teachers. Guide to JPA with Hibernate - Querying (Coming soon!)īefore getting started, let's remind us of the example we used in the previous part of this series.Guide to JPA with Hibernate: Inheritance Mapping.Guide to JPA with Hibernate - Relationships Mapping (you're here).

Guide to JPA with Hibernate - Basic Mapping.

In this article, we'll be covering relationship mappings. We'll be making a comprehensive guide to using JPA with Hibernate as its vendor.

Inheritance hibernate annotations example code#

It allows us to map our domain model directly to the database structure and then gives us the flexibility of manipulating objects in our code - instead of messing with cumbersome JDBC components like Connection, ResultSet, etc. The Java Persistence API (JPA) is the persistence standard of the Java ecosystem. In this article, we'll dive into Relationship Mapping with JPA and Hibernate in Java.