Hibernate生成奇怪的DDL,用于配置串行列和FK。示例(Book.author * -1 Authors.id):
@Entity
@Table(name = "books")
public class Book {
private Integer id;
private Author author;
@Id
@Column(name = "id", columnDefinition = "serial")
@GeneratedValue(strategy = GenerationType.IDENTITY)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
@JoinColumn(name = "author", nullable = true)
@ManyToOne(optional = true, fetch = FetchType.LAZY)
public Author getAuthor() {
return author;
}
public void setAuthor(Author author) {
this.author = author;
}
}
@Entity
@Table(name = "authors")
public class Author {
private Integer id;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
public Integer getId() {
return id;
}
public void setId(Integer id) {
this.id = id;
}
}
书籍表格中列专家的结果DDL:
ALTER TABLE books ADD COLUMN author integer;
ALTER TABLE books ALTER COLUMN author SET NOT NULL;
ALTER TABLE books ALTER COLUMN author SET DEFAULT nextval('authors_seq'::regclass);
它有奇怪的默认值,我也不能让它可以为空。是否可以在不为FK编写columnDefinition的情况下修复它?
答案 0 :(得分:1)
我已将其报告为错误https://hibernate.atlassian.net/browse/HHH-10647。目前的解决方法是使用columnDefinition for FK column:columnDefinition = "integer"