无法在模型中映射一对一关系答案

【问题标题】：Can not map one to one relationship in models无法在模型中映射一对一关系
【发布时间】：2021-09-18 22:15:54
【问题描述】：

我应该以一对一的关系将订单与发票相关联，但我遇到以下错误

Unknown mappedBy in com.example.task.model.Order.invoice referenced property unknown: com.example.task.model.Invoice.Invoice

订购型号：


@Entity
@Table(name = "Order")
public class Order{
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @Column(nullable = true)
    private LocalDate date;

    @OneToOne(cascade = CascadeType.ALL, mappedBy = "Order")
    @JoinColumn(name = "order_id", referencedColumnName = "id")
    private Invoice invoice;

    @OneToMany(targetEntity = Detail.class, cascade = CascadeType.ALL)
    @JoinColumn(name = "order_id", referencedColumnName = "id")
    private List<Detail> details;

和发票模型

@Entity
@Table(name = "Invoice")
public class Invoice {
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long id;

    @OneToOne(cascade = CascadeType.ALL)
    private Order order;

    @OneToMany(targetEntity = Payment.class, cascade = CascadeType.ALL)
    @JoinColumn(name = "inv_id", referencedColumnName = "id")
    private List<Payment> payments;

    @Column(nullable = true, precision = 8, scale = 2)
    private BigDecimal amount;

    @Column(nullable = true)
    private LocalDate issued;

    @Column(nullable = true)
    private LocalDate due;

即使我反过来改变我也有同样的错误。

【问题讨论】：

“订单”不是“订单”

标签： java spring spring-boot hibernate spring-data-jpa

【解决方案1】：

更新这一行

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "invoice_id", referencedColumnName = "id")
private Invoice invoice;

@OneToOne(mappedBy = "invoice")
private Order order;

【讨论】：

【解决方案2】：

mappedBy 属性输入错误。

使用 mappedBy = "order" O 小写

【讨论】：