@onetomany unidirectional examplo usint Spring JPA.

@OneToMany unidirectional example

@OneToMany unidirectional examplo usint Spring JPA.

Child.java

@Entity
class Child {
  
  @Id
  private String id;
  
}

Father.java

@Entity
class Father {
  
  @Id
  private String id;
  
  @OneToMany(cascade = CascadeType.ALL)
	@JoinColumn(name = "fatherId", nullable = false)
  private List<Child> children;
  
}

FatherService.java

@Service
public class FatherService {
  
  private final FatherRepository fatherRepository;
  
  public Father create(Father father) {
    return this.fatherRepository.save(father);
  }
}