Error creatin bean with name 'jpaMappingContext' and 'NameOfMyRepository'

Question

I tried to test my repository from JpaRepository in my Spring Boot Application but i get this error:

java.lang.IllegalStateException: Failed to load ApplicationContext

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'carDealerRepository' defined in schule.privas.microservice.repository.CarDealerRepository defined in @EnableJpaRepositories declared on JpaRepositoriesRegistrar.EnableJpaRepositoriesConfiguration: Cannot resolve reference to bean 'jpaMappingContext' while setting bean property 'mappingContext'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jpaMappingContext': Invocation of init method failed; nested exception is org.hibernate.AnnotationException: mappedBy reference an unknown target entity property: schule.privas.microservice.model.Car.cardealer in schule.privas.microservice.model.CarDealer.cars

(The Exception list is a lot longer but i think that is the only interesting part)

Here is the code of my Repository Test

@Transactional
@SpringBootTest
public class CarDealerRepositoryTest {

    @Autowired
    private CarDealerRepository carDealerRepository;

    private CarDealer carDealer;
    private Car car;

    @BeforeEach
    void initialize(){
        carDealer = CarDealer.builder()
                .cars(new ArrayList<Car>())
                .address("schibinabi")
                .sales(10000f)
                .build();


        car = Car.builder()
                .brand("McLaren")
                .maxSpeed(300)
                .price(10500f)
                .build();

        carDealer.addCar(car);
    }

    @Test
    void verifyFindAll(){
        Iterable<CarDealer> carDealerList = carDealerRepository.findAll();

        assertThat(carDealerList).isNotNull();
        assertThat(carDealerList).isEmpty();
    }
}

I tried to use a break point but it doesnt even comes to the code i wrote.

Here are the classes of Car and CarDealer

CarDealer:

@Entity
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
@Getter
@Setter

public class CarDealer extends AbstractPersistable<Long> {
    private Float sales;
    private String address;

    @OneToMany(mappedBy = "cardealer", cascade = CascadeType.PERSIST)
    private List<Car> cars = new ArrayList<Car>();

    public void addCar(Car car) {
        cars.add(car);
        if(!this.equals(car.getCarDealer())){
            car.setCarDealer(this);
        }
    }

    public boolean containsCar(Car car) {
        return cars.contains(car);
    }
}

Car:

@Entity
@NoArgsConstructor(access = AccessLevel.PROTECTED)
@AllArgsConstructor(access = AccessLevel.PRIVATE)
@Builder
@Getter
@Setter

public class Car extends AbstractPersistable<Long> {

    private String brand;
    private Float price;
    private Integer maxSpeed;

    @ElementCollection
    private List<String> versions;

    @ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
    @JsonIgnore
    private CarDealer carDealer;

    public void setCarDealer(CarDealer dealer) {
        this.carDealer = dealer;
        if (!dealer.containsCar(this)) {
            dealer.addCar(this);
        }
    }
}

And here is also the repository interface:

@Repository
public interface CarDealerRepository extends JpaRepository<CarDealer, Long> {
}

Answer 1

You should try to use the same casing as the property in Car.

So it should be:

 @OneToMany(mappedBy = "carDealer", cascade = CascadeType.PERSIST)

instead of:

 @OneToMany(mappedBy = "cardealer", cascade = CascadeType.PERSIST)