인프런 커뮤니티 질문&답변

"not-null property references a null or transient value : com.example.orderservice.jpa.OrderEntity.orderId; nested exception is org.hibernate.PropertyValueException: not-null property references a null or transient value : com.example.orderservice.jpa.OrderEntity.orderId"

이 오류는 com.example.orderservice.jpa.OrderEntity 클래스의 orderId 속성이 null 또는 임시 값으로 설정되어 있을 때 발생합니다. 즉, orderId 속성에는 null이 허용되지 않는데, null이나 임시 값으로 설정되었기 때문에 오류가 발생합니다.

application.yml

server:
  port: 0

spring:
  application:
    name: order-service
  h2:
    console:
      enabled: true
      settings:
        web-allow-others: true
      path: /h2-console

  sql:
    init:
      mode: always

  jpa:
    database-platform: org.hibernate.dialect.H2Dialect
    hibernate:
      ddl-auto: update
    properties:
      hibernate:
        format_sql: true
        show_sql: true
    defer-datasource-initialization: true
  datasource:
    driver-class-name: org.h2.Driver
    url: jdbc:h2:mem:testdb

  main:
    allow-bean-definition-overriding: true


eureka:
  instance:
    instance-id: ${spring.application.name}:${spring.application.instance_id:${random.value}}
  client:
    register-with-eureka: true
    fetch-registry: true
    service-url:
      defaultZone: http://127.0.0.1:8761/eureka

logging:
  level:
    com.example.orderservice: DEBUG

OrderEntity

@Data
@Entity
@Table(name = "orders")
public class OrderEntity implements Serializable {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

    @Column(nullable = false, length = 120, unique = true)
    private String productId;
    @Column(nullable = false)
    private Integer qty;
    @Column(nullable = false)
    private Integer unitPrice;
    @Column(nullable = false)
    private Integer totalPrice;

    @Column(nullable = false)
    private String userId;
    @Column(nullable = false, unique = true)
    private String orderId;

    @Column(nullable = false, updatable = false, insertable = false)
    @ColumnDefault(value = "CURRENT_TIMESTAMP")
    private Date createAt;
}

OrderDto

@Data
public class OrderDto implements Serializable {
    private String productId;
    private Integer qty;
    private Integer unitPrice;
    private Integer totalPrice;

    private String orderId;
    private String userId;
}

ResponseOrder

@Data
@JsonInclude(JsonInclude.Include.NON_NULL)
public class ResponseOrder {
    private String productId;
    private Integer qty;
    private Integer unitPrice;
    private Integer totalPrice;
    private Date createAt;

    private String orderId;
}

OrderService

public interface OrderService {
    OrderDto createOrder(OrderDto orderDetails);
    OrderDto getOrderByOrderId(String orderId);
    Iterable<OrderEntity> getOrdersByUserId(String userId);
}

OrderServiceImpl

@Service
public class OrderServiceImpl implements OrderService{
    OrderRepository orderRepository;

    @Autowired
    public OrderServiceImpl(OrderRepository orderRepository){
        this.orderRepository = orderRepository;
    }

    @Override
    public OrderDto createOrder(OrderDto orderDto){
        orderDto.setUserId(UUID.randomUUID().toString());
        orderDto.setTotalPrice(orderDto.getQty() * orderDto.getUnitPrice());

        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);
        OrderEntity orderEntity = mapper.map(orderDto, OrderEntity.class);


        orderRepository.save(orderEntity);

        OrderDto returnValue = mapper.map(orderEntity, OrderDto.class);

        return returnValue;
    }

    @Override
    public OrderDto getOrderByOrderId(String orderId) {
        OrderEntity orderEntity = orderRepository.findByOrderId(orderId);
        OrderDto orderDto = new ModelMapper().map(orderEntity, OrderDto.class);

        return orderDto;
    }

    @Override
    public Iterable<OrderEntity> getOrdersByUserId(String userId) {
        return orderRepository.findByUserId(userId);
    }
}

OrderController

@RestController
@RequestMapping("/order-service")
public class OrderController {
    Environment env;
    OrderService orderService;

    @Autowired
    public OrderController(Environment env, OrderService orderService) {
        this.env = env;
        this.orderService = orderService;
    }

    @GetMapping("/health_check")
    public String status(){
        return String.format("It's Working in Order Service on PORT %s",
            env.getProperty("local.server.port"));
    }

    // http://127.0.0.1:0/order-service/{user_id}/orders/
    @PostMapping("/{userId}/orders")
    public ResponseEntity<ResponseOrder> createOrder(@PathVariable("userId") String userId,
                                                     @RequestBody RequestOrder orderDetails){
        ModelMapper mapper = new ModelMapper();
        mapper.getConfiguration().setMatchingStrategy(MatchingStrategies.STRICT);

        OrderDto orderDto = mapper.map(orderDetails, OrderDto.class);
        orderDto.setUserId(userId);
        OrderDto createOrder = orderService.createOrder(orderDto);

        ResponseOrder responseOrder = mapper.map(createOrder, ResponseOrder.class);

        return ResponseEntity.status(HttpStatus.CREATED).body(responseOrder);
    }

    @GetMapping("/{userId}/orders")
    public ResponseEntity<List<ResponseOrder>> getOrder(@PathVariable("userId") String userId){
        Iterable<OrderEntity> orderList = orderService.getOrdersByUserId(userId);

        List<ResponseOrder> result = new ArrayList<>();
        orderList.forEach(v -> {
            result.add(new ModelMapper().map(v, ResponseOrder.class));
        });

        return ResponseEntity.status(HttpStatus.OK).body(result);
    }
}

다 똑같이 쳤는데 뭐가 문제일까요?