用途
@UniqueConstraint：
@Table( uniqueConstraints= @UniqueConstraint(columnNames={"author_id", "number"}))@Entityclass Book extends Model { @ManyToOne @JoinColumn(name = "author_id") User author; int number; }
用途
@UniqueConstraint：
@Table( uniqueConstraints= @UniqueConstraint(columnNames={"author_id", "number"}))@Entityclass Book extends Model { @ManyToOne @JoinColumn(name = "author_id") User author; int number; }名师互学网 版权所有 (c)2021-2022 ICP备案号：晋ICP备2021003244-6号
