我的应用程序中有 2 个模型,它们具有一对多和多对一关系。
模型类是:
发票模型
@Entity
@Data
public class Invoice implements java.io.Serializable {
@Id
@GeneratedValue(generator = "system-uuid")
@GenericGenerator(name = "system-uuid", strategy = "uuid2")
private String id;
private String business;
private String client;
private String invoiceNo;
@Enumerated(EnumType.STRING)
private InvoiceStatus status;
private String additionalInfo;
@OneToMany(mappedBy = "invoice")
private Set<InvoiceItem> items = new HashSet<>();
@CreationTimestamp
private LocalDateTime createdAt;
@UpdateTimestamp
private LocalDateTime updatedAt;
private LocalDateTime deletedAt;
}
发票项目模型
@Entity
@Data
public class InvoiceItem {
@Id
@GeneratedValue(generator = "system-uuid")
@GenericGenerator(name = "system-uuid", strategy = "uuid2")
private String id;
@ManyToOne
@JoinColumn(name="invoice_id", nullable = false)
private Invoice invoice;
private String description;
@Enumerated(EnumType.STRING)
private InvoiceItemType type;
@CreationTimestamp
private LocalDateTime createdAt;
@UpdateTimestamp
private LocalDateTime updatedAt;
private LocalDateTime deletedAt;
}
我有一个 api 端点,用于为发票创建发票项目
@RestController
@RequestMapping(path="/api/v1/invoices/{invoice}/items")
public class InvoiceItemController {
@Autowired
private ModelMapper modelMapper;
@Autowired
private InvoiceItemService invoiceItemService;
@Autowired
private InvoiceService invoiceService;
@PostMapping
public ResponseEntity<InvoiceItem> addInvoiceItem(@PathVariable("invoice") String invoiceId, @RequestBody InvoiceItemCreationDto invoiceItemCreationDto) throws NotFoundException {
Optional<Invoice> invoiceOptional = invoiceService.findInvoiceById(invoiceId);
if (!invoiceOptional.isPresent()) {
throw new NotFoundException("Invoice not found");
}
InvoiceItem invoiceItem = modelMapper.map(invoiceItemCreationDto, InvoiceItem.class);
invoiceItem.setInvoice(invoiceOptional.get());
InvoiceItem savedInvoiceItem = invoiceItemService.addInvoiceItem(invoiceItem);
return new ResponseEntity<>(savedInvoiceItem, HttpStatus.CREATED);
}
}
发票服务
package com.spencerfeng.invoiceservice.services;
import com.spencerfeng.invoiceservice.models.Invoice;
import com.spencerfeng.invoiceservice.repositories.InvoiceRepository;
import org.springframework.beans.factory.annotation.Autowired;
import java.util.Optional;
public class InvoiceServiceImpl implements InvoiceService {
@Autowired
InvoiceRepository invoiceRepository;
@Override
public Invoice addInvoice(Invoice invoice) {
return invoiceRepository.save(invoice);
}
@Override
public Optional<Invoice> findInvoiceById(String id) {
return invoiceRepository.findById(id);
}
}
发票存储库
package com.spencerfeng.invoiceservice.repositories;
import com.spencerfeng.invoiceservice.models.Invoice;
import org.springframework.data.repository.CrudRepository;
public interface InvoiceRepository extends CrudRepository<Invoice, String> {
}
发票项目服务
package com.spencerfeng.invoiceservice.services;
import com.spencerfeng.invoiceservice.models.InvoiceItem;
import com.spencerfeng.invoiceservice.repositories.InvoiceItemRepository;
import org.springframework.beans.factory.annotation.Autowired;
public class InvoiceItemServiceImpl implements InvoiceItemService {
@Autowired
private InvoiceItemRepository invoiceItemRepository;
@Override
public InvoiceItem addInvoiceItem(InvoiceItem invoiceItem) {
return invoiceItemRepository.save(invoiceItem);
}
}
但是,当我调用此 api 端点为发票创建发票项目时,invoiceOptional 中的 items 属性出现“无法评估表达式方法抛出 'org.hibernate.exception.GenericJDBCException' 异常,而其他属性都很好.
最佳答案
您可以尝试排除一个 POJO 上的循环 tostring\hashcode 引用:
@ToString(exclude = "invoice")
@EqualsAndHashCode(exclude = "invoice")
@Entity
@Getter @Setter
public class InvoiceItem {
或者通过在字段上使用 @EqualsAndHashCode.Exclude 和 @ToString.Exclude 来实现
@Entity
@Data
public class InvoiceItem {
@ManyToOne
@EqualsAndHashCode.Exclude @ToString.Exclude
@JoinColumn(name="invoice_id", nullable = false)
private Invoice invoice;
关于java - 无法计算表达式方法抛出 'org.hibernate.exception.GenericJDBCException' 异常,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/59724177/