Spring Boot | Spring Data JPA

Understanding Relationships in JPA: One-to-Many with Composite Primary Key

Discussing “One-to-Many with Composite Primary Key” and examining how JPA/Hibernate generates the corresponding tables

Ivan Franchin
5 min readMay 8, 2023

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Photo by Scandinavian Backlash on Unsplash

As mentioned in the introductory article of this series, I’ve faced difficulties in implementing JPA relationships correctly in my applications.

To enhance my understanding of them, I developed a GitHub repository called ivangfr/spring-data-jpa-relationships, containing simple examples for each relationship type.

In this series of articles, we will demonstrate each JPA relationship type by presenting the necessary code to map the entities and examining how JPA/Hibernate generates the tables.

I hope you find these articles and the GitHub repository helpful.

Today, we will talk about “One-to-Many with Composite Primary Key”. So, let’s get started!

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Ivan Franchin

Lead Software Developer with BS and MS in Computer Science. Writing about Java, Spring, software development in general, and emerging technologies.