Question

我正在使用JPA规范来执行多表关联查询。但是数据是错误的。我想用   “很多”中的条件查询。这是我的代码

1。这是我的某些映射类的代码：

@Entity
@Table(..)
public class SkuLinesEntity {
    @Id
    @Column(name = "pk_id")
    private long pkId;
    @ManyToOne(cascade = CascadeType.PERSIST,targetEntity = ItemLinesEntity.class)
    @JoinColumn(name="fk_item_id",referencedColumnName="pk_id")
    @JsonIgnore
    private ItemLinesEntity itemLinesEntity;
...
}


@Entity
@Table(..)
public class OrdersEntity {

    @Id
    @Column(name = "pk_id")
    private Long pkId;

    @ManyToOne(cascade={CascadeType.REFRESH},targetEntity = ShopCartsEntity.class,optional = false)
    @JoinColumn(name = "fk_cart_id")
    @JsonIgnore
    private ShopCartsEntity shopCartsEntity;

    @OneToMany(mappedBy = "ordersEntity",fetch=FetchType.EAGER,targetEntity = ItemLinesEntity.class)
    private List<ItemLinesEntity> items;
...
}


@Entity
@Table(...)
public class ItemLinesEntity {
    @Id
    @Column(name = "pk_id")
    private Long pkId;
   @ManyToOne(cascade = CascadeType.PERSIST,targetEntity = OrdersEntity.class)
    @JoinColumn(name="fk_order_id",referencedColumnName="pk_id")
    @JsonIgnore
    private OrdersEntity ordersEntity;

    @OneToMany(mappedBy = "itemLinesEntity",fetch=FetchType.EAGER,targetEntity = SkuLinesEntity.class)
    private List<SkuLinesEntity> skus;
...
}


@Entity
@Table(...)
public class SkuLinesEntity {
    @Id
    @Column(name = "pk_id")
    private Long pkId;
    @ManyToOne(cascade = CascadeType.PERSIST,targetEntity = ItemLinesEntity.class)
    @JoinColumn(name="fk_item_id",referencedColumnName="pk_id")
    @JsonIgnore
    private ItemLinesEntity itemLinesEntity;
...
}

    ``` java 
    **//This is my query code：**

    Specification<ShopCartsEntity> find = new Specification<ShopCartsEntity>() {
                @Override
                public Predicate toPredicate(Root<ShopCartsEntity> root, CriteriaQuery<?> criteriaQuery, CriteriaBuilder cb) {
    //                Predicate p = cb.conjunction();
                    List<Predicate> predicates = new ArrayList<>();
                    Join<ShopCartsEntity, OrdersEntity> orders = root.join("orders");
                    if(!StringUtils.isBlank(shopOrder.getSoNumber())){
                        predicates
                            .add(cb.like(cb.upper(orders.get("epSoNumber")),"%"+ shopOrder.getSoNumber().toUpperCase()+"%"));
                    }

                    Join<OrdersEntity, ItemLinesEntity> items = orders.join("items");
                    if(!StringUtils.isBlank(shopOrder.getProductId())){
                        predicates
                            .add(cb.like(cb.upper(items.get("productId")),"%"+ shopOrder.getProductId().toUpperCase()+"%"));
                    }
                    if(!StringUtils.isBlank(shopOrder.getStyleNo())){
                        predicates
                            .add(cb.like(cb.upper(items.get("styleNo")),"%"+ shopOrder.getStyleNo().toUpperCase()+"%"));
                    }

                    predicates
                        .add(cb.equal(orders.get("dataFlag"),0));
                    return criteriaQuery.where(predicates.toArray(new Predicate[predicates.size()])).getRestriction();
                }
            };

    ```

我正在寻找这个。但是生成的语句有多个段落，不是我想要的。只有父表才是正确的查询条件，以下所有都是基于ID的相关查询。以下是结果比较

Generated SQL:
    **Hibernate: select shopcartse0_.pk_id as pk_id1_3_, shopcartse0_.creation_time as creation2_3_, shopcartse0_.main_program_code as main_pro3_3_, shopcartse0_.sub_program_code as sub_prog4_3_, shopcartse0_.update_time as update_t5_3_, shopcartse0_.user_id as user_id6_3_ from public.ep2_sc_shop_carts shopcartse0_ inner join public.ep2_sc_orders orders1_ on shopcartse0_.pk_id=orders1_.fk_cart_id inner join public.ep2_sc_item_lines items2_ on orders1_.pk_id=items2_.fk_order_id where upper(shopcartse0_.user_id)=? and upper(shopcartse0_.main_program_code)=? and (upper(orders1_.ep_so_number) like ?) and orders1_.data_flag=0 limit ?
    Hibernate: select .. from public.ep2_sc_orders orders0_ where orders0_.fk_cart_id=?
    Hibernate: select .. from public.ep2_sc_item_lines items0_ where items0_.fk_order_id=?
    Hibernate: select .. from public.ep2_sc_sku_lines skus0_ where skus0_.fk_item_id=?**

    **//I hope:
    //    "records": {
    //        "orders": [{
    //            "soNumber": "EP2TGDY00000358",
    //                    "orderId": 781,],
    //            "items": [{
    //                "itemId": 883,
    //                        "itemType": "variable",
    //                        "prodCode": "TGTGHKH002",
    //                        "skus": []
    //            }
    //              ]
    //        }
    //      ]
    //    }
    ////But the display is indeed like this：
    //
    //  "records": {
    //        "orders": [{
    //            "soNumber": "EP2TGDY00000358",
    //                    "orderId": 781,],
    //            "items": [{
    //                "itemId": 883,
    //                        "itemType": "variable",
    //                        "prodCode": "TGTGHKH002",
    //                        "skus": []
    //            },
    //            {
    //                "itemId": 884,
    //                    "itemType": "variable",
    //                    "prodId": "TGTGHKH003",
    //                    "skus": []
    //            }
    //              ]
    //        }
    //      ]
    //    }****

Jpa规范查询数据联接子项无效条件

0 个答案: