We are developing a web system using SpringBoot.
I know how to retrieve data from JPA findById (ID id) in general, but
I would like to set Entity with multiple @IDs to retrieve data with multiple IDs.
I don't know how to implement it.There are not many samples...
In this case, do I use findAllById (Iterable id)?
Supplemental
I'm looking for a way other than findBy△△And 〇 〇() method
Annotation @IdClass allows you to express compound principal keys
@Entity
@IdClass(FullName.class)
public class Person {
@Id
private String sei;
@Id
private String mei;
private LocalDate birthday;
// getters and setsters
}
public class FullName implements Serializable {
/** Last Name*/
private String sei;
/** First Name*/
private String mei;
}
However, if you use the Spring Data JPA repository interface at this time, as in the case of the monomial main key,
@Repository
public interface PersonRepository extensions JpaRepository <Person, FullName > {
}
The definition is as follows:
Therefore, the method of searching by the primary key remains the same, using the findById method, which takes the primary key type (FullName) as the argument.
@RestController
@RequestMapping("")
@RequiredArgsConstructor
public class MyController {
private final personRepository personRepository;
@GetMapping
public Optional <Person>index(){
return personRepository.findById(new FullName("Nitobe", "Inazukuri"));
}
}
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