[英]I have Mapping Exception on my Spring Boot project
我的项目中有 3 个模型和 1 个表与多对多关系:
@Embeddable
@Getter
@Setter
public class ProductWarehouseId implements Serializable {
@Column(name = "warehouse_Id")
private Long warehouseId;
@Column(name = "product_Id")
private Long productId;
@Column(name = "user_Id")
private Long userId;
public ProductWarehouseId() {
}
public ProductWarehouseId(Long warehouseId, Long productId, Long userId) {
this.warehouseId = warehouseId;
this.productId = productId;
this.userId = userId;
}
}
---------------------------------------------------
@Entity
@NoArgsConstructor
@Getter
@Setter
public class ProductWarehouse {
@EmbeddedId
ProductWarehouseId productWarehouseId;
@ManyToOne(fetch = FetchType.LAZY)
@MapsId("productId")
@JoinColumn(name = "product_id")
ProductEntity product ;
@ManyToOne(fetch = FetchType.LAZY)
@MapsId("warehouseId")
@JoinColumn(name = "warehouse_id")
WarehouseEntity warehouse ;
@ManyToOne(fetch = FetchType.LAZY)
@MapsId("userId")
@JoinColumn(name = "user_id")
UserEntity userEntity;
@Column(name = "stockAmount")
private Long stockAmount;
@Column(name = "transctionDate")
@Temporal(TemporalType.TIMESTAMP)
private Date transactionDate = new Date();
public ProductWarehouse(ProductEntity product, UserEntity user) {
this.product = product;
this.userEntity = user;
}
}
********************************************************
@Getter
@Setter
@Entity
@RequiredArgsConstructor
public class ProductEntity extends BaseEntity{
@OneToMany(mappedBy = "product",cascade = CascadeType.ALL)
private Set<ProductWarehouse> productWarehouses;
//And more veriables
}
------------------------------------
@Getter
@Setter
@Entity
public class WarehouseEntity extends BaseEntity{
@OneToMany(mappedBy = "warehouse",cascade = CascadeType.ALL)
private Set<ProductWarehouse> productWarehouses = new HashSet<>();
//and more veriables
}
当我尝试从 product_warehouse 表中对 select 列表进行更改时,我有一些例外。 我想使用 fromId 和 toId 在仓库之间转移产品
我在服务 class 中使用此方法:
@Override
@Transactional
public void transfer(Long fromId, Long toId) {
WarehouseEntity warehouseEntity = warehouseCRUDRepository.getOne(fromId);
WarehouseEntity warehouseEntity1 = warehouseCRUDRepository.getOne(toId);
if (warehouseEntity.getStatus().equals(WarehouseStatus.ACTIVE) && warehouseEntity1.getStatus().equals(WarehouseStatus.ACTIVE)){
Collection<ProductWarehouse> productWarehouses = em
.createNativeQuery("select c from product_warehouse c where c.warehouse_id =:fromId")
.setParameter("fromId",fromId)
.getResultList();
for (ProductWarehouse p : productWarehouses){
p.getProductWarehouseId().setWarehouseId(toId);
p.setWarehouse(warehouseCRUDRepository.getOne(toId));
}
}
}
例外是:
Servlet.service() 用于路径 [] 上下文中的 servlet [dispatcherServlet] 引发异常 [请求处理失败; 嵌套异常是 javax.persistence.PersistenceException: org.hibernate.MappingException: No Dialect mapping for JDBC type: 2002] 的根本原因。
你能帮帮我吗? 对不起我的英语,谢谢。
ProductWarehouse
里面已经有Warehouse
,我不明白你为什么要通过在 for 循环中从数据库中获取它来再次设置它。
我没有看到该方法中 for 循环的任何必要性,同样正如您在上面描述的那样,您没有在任何地方定义多对多关系。 在建立关系时,您可以使用连接表,如此处所述
如果您需要更多信息,请分享您的需求和您面临的错误的更多详细信息。
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