如何在 JPA 的引用表列上使用 uniqueConstraint

Question

如何在唯一约束中包含引用的表列？我想为 toEmail、receipt.receiptSeries 和 receipt.receiptNum 列的表调查创建唯一约束。

请查看以下实体：

收据

@Entity
@Table(name = "RECEIPT")
public class Receipt {

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "ID")
  private Long id;

  @Column(name = "RECEIPT_SERIES")
  private String receiptSeries;

  @Column(name = "RECEIPT_NUM")
  private String receiptNum;
}

调查

@Entity
@Table(name = "SURVEY"}
public class Survey {

  @Id
  @GeneratedValue(strategy = GenerationType.AUTO)
  @Column(name = "ID")
  private Long id;

  @ManyToOne(optional = false)
  @JoinColumn(name = "RECEIPT_ID")
  private Receipt receipt;

  @Column(name = "TO_EMAIL")
  private String toEmail;
}

我尝试使用以下方法但没有成功：

@Table(name = "SURVEY", uniqueConstraints = {
    @UniqueConstraint(columnNames = {"TO_EMAIL", "RECEIPT.RECEIPT_SERIES", "RECEIPT.RECEIPT_NUM"})})

不能选择使用带有receiptSeries 和receiptNum 的复合主键作为收据。

Answer 1

试试这样的

@Table(name="notification_status", uniqueConstraints= 
       arrayOf(UniqueConstraint(columnNames= arrayOf("external_user_id",
                                                     "external_organization_id",  
                                                     "notification_id"))))