Question

当我使用skuRepository.getAll（）时，它可以正常工作，但是当我应用规范中定义的过滤器时（列表filteredRegs = skuRepository.getAll（specification）），我仍然获得表的所有行我应该怎么做才能将规范应用于我的自定义方法？

public interface SkuRepository extends CrudRepository<Sku, Integer>, JpaSpecificationExecutor<Sku> {

    @Query("select s from Sku s join fetch s.unit un join fetch s.supplier sup WHERE un.id = sku_unit_id AND sup.id = supplier_id")
    List<Sku> getAll(@Nullable Specification<Sku> var1);

    @Query("select s from Sku s join fetch s.unit un join fetch s.supplier sup WHERE un.id = sku_unit_id AND sup.id = supplier_id")
    List<Sku> getAll();
}

UPD：这是我的实体。当我使用规范API通过Sku表进行抽样时，在日志中看到三个单独的选择：一个用于Sku实体，一个用于单位，一个用于供应商。我希望我的应用对联接进行选择。我读到这是由于我使用EAGER访存类型，所以我将其更改为LAZY，但随后又遇到另一个问题：“ InvalidDefinitionException：未找到序列化程序...”这是合乎逻辑的，因为相关的实体Unit和Supplier是未加载。然后，我决定编写带有请求的自定义getAll（）：

@Query("select s from Sku s join fetch s.unit un join fetch s.supplier sup WHERE un.id = sku_unit_id AND sup.id = supplier_id ORDER BY s.name")

但是现在它不支持规范。请告知该怎么办。

@Entity
@Table(name = "sku")
public class Sku implements Cloneable, CloneableEntity {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id")
    private int id;

    @Column(name = "sku_code", length = 6, nullable = false, unique = true)
    private String code;

    @Column(name = "sku_name", nullable = false)
    private String name;

    @ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
    @JoinColumn(name = "sku_unit_id", nullable = false)
    private Unit unit;

    @ManyToOne(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
    @JoinColumn(name = "supplier_id", nullable = false)
    private Supplier supplier;

    @Column(name = "qty_in_sec_pkg")
    private int quantityInSecondaryPackaging;

    @Column(name = "sku_is_active", nullable = false)
    private boolean isActive;

//constructors, getters, setters

}

@Entity
@Table(name = "units")
public class Unit {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id ")
    private int id;

    @Column(name = "unit", nullable = false, unique = true)
    private String unit;

    @Column(name = "description")
    private String description;

//constructors, getters, setters
}

@Entity
@Table(name = "suppliers")
public class Supplier {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Column(name = "id ")
    private int id;

    @Column(name = "supplier_code", length = 6, nullable = false, unique = true)
    private String supplierCode;

    @Column(name = "supplier_name", nullable = false)
    private String name;

    @Column(name = "create_date", length = 19, nullable = false)
    private String createDate;

    @Column(name = "update_date", length = 19)
    private String updateDate;
//constructors, getters, setters
}

Answer 1

您不能混用@Query和Specification

您只能使用JpaSpecificationExecutor接口方法来使用规范。

查找更多详细信息here

如何在JPA存储库中使用规范编写自定义的findAll（）

1 个答案: