Question

我遇到了命名查询的问题。首先，我想了解一个可能的原因可能是一个原因（一些beyound语法错误）。其次，我很高兴听到你关于可能解决方案的问题。提前谢谢。

我有一个NamedQuery：

        @NamedQuery(name = "HotelsEntity.findAllWithFilter",
            query = "select h from HotelsEntity h " +
                    /*"left join fetch h.reservationDates hReservationDates " +*/
                    "left join fetch h.property hProperty " +
                    "left join fetch h.rooms hRooms " +
                    "left join fetch hRooms.inventory inventory " +
                    "left join fetch inventory.reservation reservation " +
                    "where " +
                    "hProperty.hasPool = :pool " +
                        "AND hProperty.hasTennisCourt = :tennis " +
                        "AND hProperty.hasWaterslides = :waterslides " +
                        "AND hRooms.peopleCapacity >= :capacity " +
                        "AND hRooms.locked = false " +
                        "AND (" +
                            "(reservation.checkIn <= :checkin AND reservation.checkOut >= :checkin) " +
                            "OR " +
                            "(reservation.checkIn >= :checkin AND reservation.checkOut <= :checkout) " +
                            "OR " +
                            "(reservation.checkIn >= :checkin AND reservation.checkOut >= :checkout) )"),

它有效。我想再向ReservationDatesEntity添加一个连接：

        @NamedQuery(name = "HotelsEntity.findAllWithFilter",
            query = "select h from HotelsEntity h " +
                    "left join fetch h.reservationDates hReservationDates " +
                    "left join fetch h.property hProperty " +
                    "left join fetch h.rooms hRooms " +
                    "left join fetch hRooms.inventory inventory " +
                    "left join fetch inventory.reservation reservation " +
                    "where " +
                    "hProperty.hasPool = :pool " +
                        "AND hProperty.hasTennisCourt = :tennis " +
                        "AND hProperty.hasWaterslides = :waterslides " +
                        "AND hRooms.peopleCapacity >= :capacity " +
                        "AND hRooms.locked = false " +
                        "AND (" +
                            "(reservation.checkIn <= :checkin AND reservation.checkOut >= :checkin) " +
                            "OR " +
                            "(reservation.checkIn >= :checkin AND reservation.checkOut <= :checkout) " +
                            "OR " +
                            "(reservation.checkIn >= :checkin AND reservation.checkOut >= :checkout) )"),

它与org.hibernate.HibernateException: Errors in named queries: HotelsEntity.findAllWithFilter失败了。命名查询中错误的原因是什么？

public class HotelsEntity implements HospitalityEntity{
private int idHotel;
private String name;
private String region;
private String description;
private String photo;

private HotelPropertyEntity property;
private List<RoomEntity> rooms;
private List<ReservationDatesEntity> reservationDates;

@OneToMany(mappedBy = "hotel")
public List<ReservationDatesEntity> getReservationDates() {
    return reservationDates;
}

public void setReservationDates(List<ReservationDatesEntity> reservationDates) {
    this.reservationDates = reservationDates;
}

@OneToOne(fetch = FetchType.LAZY)
@JoinColumn(name = "id_hotel_property")
public HotelPropertyEntity getProperty() {
    return property;
}

public void setProperty(HotelPropertyEntity property) {
    this.property = property;
}

@OneToMany(mappedBy = "hotel")
public List<RoomEntity> getRooms() {
    return rooms;
}

public void setRooms(List<RoomEntity> rooms) {
    this.rooms = rooms;
}

@Id
@Column(name = "id_hotel", unique = true)
@GeneratedValue(strategy=GenerationType.AUTO)
public int getIdHotel() {
    return idHotel;
}

public void setIdHotel(int idHotel) {
    this.idHotel = idHotel;
}

@Basic
@Column(name = "name")
public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

@Basic
@Column(name = "region")
public String getRegion() {
    return region;
}

public void setRegion(String region) {
    this.region = region;
}

@Basic
@Column(name = "description")
public String getDescription() {
    return description;
}

public void setDescription(String description) {
    this.description = description;
}

@Basic
@Column(name = "photo")
public String getPhoto() {
    return photo;
}

public void setPhoto(String photo) {
    this.photo = photo;
}

和ReservationDatesEntity：

@Entity
@Table(name = "reservation_dates", schema = "", catalog = "mydb",
    uniqueConstraints = {
            @UniqueConstraint(columnNames = "id")
    })
public class ReservationDatesEntity implements HospitalityEntity {
private int id;
private long checkIn;
private long checkOut;
private int hotelId;

private HotelsEntity hotel;

@JsonBackReference
@ManyToOne
@JoinColumn (name = "id_hotel", insertable = false, updatable = false )
public HotelsEntity getHotel() {
    return hotel;
}

public void setHotel(HotelsEntity hotel) {
    this.hotel = hotel;
}

@Id
@Column(name = "id", columnDefinition="bigint(20)")
public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

@Basic
@Column(name = "id_hotel", columnDefinition="bigint(20)")
public int getHotelId() {
    return hotelId;
}

public void setHotelId(int hotelId) {
    this.hotelId = hotelId;
}

@Basic
@Column(name = "check_in", columnDefinition="bigint(20)")
public Long getCheckIn() {
    return checkIn;
}

public void setCheckIn(Long checkIn) {
    this.checkIn = checkIn;
}

@Basic
@Column(name = "checkout", columnDefinition="bigint(20)")
public Long getCheckOut() {
    return checkOut;
}

public void setCheckOut(Long checkOut) {
    this.checkOut = checkOut;
}

}

Answer 1

虽然您的日志错误不是描述性的，但看起来您正试图获取两个列表（包含语义）并且hibernate不喜欢这样。您可以使用here

中提到的不同技术来解决这个问题

HibernateException：命名查询中的错误：可能的原因是什么？

1 个答案: