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javaspringhibernatejpah2

Read from JPA repository No property .. found for type

I warmly welcome, I'm trying to get one value from my repository. However, I have a problem at the beginning I struggled with a null pointer exeption error. Now I'm getting:

No property findbyCurrencyDTO found for type CurrencyDTO

!. I am asking for help, I tried in various ways and to no avail.

public class Conversion {
    @Autowired

    CurrencyRepository currencyRepository;

    public String conversion () {

        System.out.println(currencyRepository.findbyCurrencyDTO("PLN"));


        return "ok";

    }


@Repository
public interface CurrencyRepository extends JpaRepository<CurrencyDTO, Long> {
    CurrencyDTO findbyCurrencyDTO(String id);

}



@Entity
@Table(name = "CurrencyDTO")
public class CurrencyDTO extends CurrencyAPIOutput implements Serializable {
private static final long serialVersionUID = 1L;

@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;

private Double cAD;

private Double hKD;
private Double pLN;

///ETC ,,

Test

 public static void main(String[] args) {

    SpringApplication.run(FlightRadarApplication.class, args);
    Conversion conversion = new Conversion();
    conversion.conversion();


}

Caused by: org.springframework.data.mapping.PropertyReferenceException: No property findbyCurrencyDTO found for type CurrencyDTO!

Database

Solution

  • This error occurs because CurrencyDTO doesn't have a CurrencyDTO field. For instance, you can add findByCAD. In your case, I suppose you can use JpaRepository method findAllById.