Question

所以我想比较我连接的两个实体的两个ID，我想如果我给你一个代码，我会更好的解释

OfferOrder.java

@Data
@Entity
@Table(name = "offer_order", schema = "srp")
@SequenceGenerator(name = "sequence_generator", sequenceName = "srp.offer_order_seq", allocationSize = 1)
@EqualsAndHashCode(callSuper = false, exclude = { "offerOrderProjectRel", "associatedOrder" })
@ToString(callSuper = true)
@NoArgsConstructor
public class OfferOrder extends BaseEntity {
[...]

    @OneToMany(mappedBy = "pk.offerOrder")
    private Set<OfferOrderProjectRel> offerOrderProjectRel = new HashSet<OfferOrderProjectRel>();
[..]
}

ID位于BaseEntity

@Id
@GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "sequence_generator")
protected Long id;

我必须将此ID与来自OfferOrderProjectRel的ID进行比较

    @Data
    @Entity
    @Table(name = "offer_order_project_rel", schema = "srp")
    @AssociationOverrides({
            @AssociationOverride(name = "pk.offerOrder",
                    joinColumns = @JoinColumn(name = "offer_order_id")),
            @AssociationOverride(name = "pk.project",
                    joinColumns = @JoinColumn(name = "project_id")) })
    @EqualsAndHashCode(callSuper = false)
    @ToString(callSuper = true)
    @NoArgsConstructor
    public class OfferOrderProjectRel {

        @EmbeddedId
        private OfferOrderProjectRelId pk = new OfferOrderProjectRelId();

        @Transient
        @NotNull
        private OfferOrder offerOrder;

}

其中包含来自OfferORderProjectRelId

的嵌入式ID

@Embeddable
@EqualsAndHashCode(callSuper = false)
public class OfferOrderProjectRelId implements Serializable {

    @ManyToOne
    private OfferOrder offerOrder;

}

所以，在我展示了重要的东西（：P）后，我要创建一个问题来休眠

private static final String SELECT_OOPR_TO_SEND = "SELECT R " +
                                                  "FROM OfferOrderProjectRel R, OfferOrder O, Project P " +
                                                  "WHERE R.project.id = P.id and O.id = R.offerOrder.id " +
                                                  "and O.type = 'ORDER' and (P.status = 'PENDING' or P.status ='PROTECTED')" ;

正如你可以看到我在那里连接另一个实体，但是一旦我通过这个，我就能做另一个我认为。

所以，当我这个hql，我得到那个错误

org.hibernate.QueryException：无法解析属性： offerOrder （或项目）： pl.srp.beans.schema.srp.OfferOrderProjectRel [SELECT R FROM pl.srp.beans.schema.srp.OfferOrderProjectRel R， pl.srp.beans.schema.srp.OfferOrder O，pl.srp.beans.schema.srp.Project P WHERE R.project.id = P.id和O.id = R.offerOrder.id和O.type = 'ORDER'和（P.status ='PENDING'或P.status ='PROTECTED'）]

我也试过O = R.offerOrder等等。那么我的问题呢？

Answer 1

你需要offerOrder的公共制定者和吸气者，没有吸气剂，私人变量不能被称为

比较来自实体hql的ID

1 个答案: