The best way to map a @OneToMany relationship with JPA and Hibernate

Introduction In a relational database system, a one-to-many association between links two tables based on a Foreign Key column so that the child table record references the Primary Key of the parent table row. As straightforward as it might be in a RDBMS, when it comes to JPA, the one-to-many database association can be represented either through a @ManyToOne or a @OneToMany association since the OOP association can be either unidirectional or bidirectional. The @ManyToOne annotation allows you to map the Foreign Key column in the child entity mapping so that the… Read More

A beginner’s guide to JPA and Hibernate Cascade Types

Introduction JPA translates entity state transitions to database DML statements. Because it’s common to operate on entity graphs, JPA allows us to propagate entity state changes from Parents to Child entities. This behavior is configured through the CascadeType mappings.

Hypersistence Optimizer can automatically detect if you are using JPA and Hibernate properly