带Enum的JpaRepository：findAllByOfferState_ACTIVE。 NoSuchElementException

Question

我想要获得所有报价（其中）OfferState等于ACTIVE - 是否可以使用Spring Data仅使用方法名称，或者我必须使用@Query？

@Repository 
public interface OfferRepository extends JpaRepository<Offer, Long> { 
    Page<Offer> findAllByOfferState_ACTIVE(Pageable pageable); 
} 

public enum OfferState { 
    ACTIVE, FINISHED 
} 

@Entity 
@Table(name = "OFFERS") 
@Getter 
@Setter 
@NoArgsConstructor 
@AllArgsConstructor 
public class Offer { 

    @Id 
    @GeneratedValue 
    private Long id; 

    [...] 

    @Enumerated(EnumType.STRING) 
    private OfferState offerState; 
} 

@Service 
public class OfferServiceImpl implements OfferService { 

    @Autowired 
    private OfferRepository offerRepository; 

    @Override 
    public Offer saveOffer(Offer offer) { 
     offer.setOfferState(OfferState.ACTIVE); 
     return offerRepository.save(offer); 
    } 

    @Override 
    public Page<Offer> getAllByPage(Pageable pageable) { 
     Page<Offer> allByOfferState_active = offerRepository.findAllByOfferStateACTIVE(pageable); 
     return allByOfferState_active; 
    } 
} 

是findAllByOfferState_ACTIVE错误？当我做GET时，然后在我的服务方法getAllByPage中抛出异常Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.util.NoSuchElementException] with root cause。我试过@Enumerated(EnumType.STRING)，没有它，但仍然是一样的。

Answer 1

您可以创建一个默认的接口方法：

public interface OfferRepository extends JpaRepository<Offer, Long> { 

    default List<Offer> findAllWhereOfferStateIsActive() { 
     return findByOfferState(OfferState.ACTIVE); 
    } 

    List<Offer> findByOfferState(OfferState state); 
} 

Answer 2

public interface OfferRepository extends PagingAndSortingRepository<Offer, Long> { 

    Page<Offer> findByOfferState(OfferState state,Pageable pageable); 

}