我在尝试删除包含不应发生的 OneToMany 关系的对象时遇到约束问题。我设置了 cascade = CascadeType.ALL
,尝试添加特定于 Hibernate 的 @Cascade
注释,尝试重建一个新数据库,我什至在下面创建了最小示例失败。
Cannot delete or update a parent row: a foreign key constraint fails (`test-db`.`bar`, CONSTRAINT `FKdvoqij212wwl2bf14kwo55h55` FOREIGN KEY (`foo_id`) REFERENCES `foo` (`id`))
要级联的对象
@Entity
public class Bar {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@ManyToOne
private Foo foo;
// Constructor, getters and setters omitted
}
包含级联的类
@Entity
public class Foo {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private long id;
@OneToMany(mappedBy = "foo", cascade = CascadeType.ALL, orphanRemoval = true)
private List<Bar> bars;
// Constructor, getters and setters omitted
}
测试:
// Spring Data JPA Repositories (extend CrudRepository)
@Autowired private FooRepository fooRepository;
@Autowired private BarRepository barRepository;
@Test
public void test() {
final Foo foo = new Foo();
fooRepository.save(foo);
final Bar bar = new Bar();
bar.setFoo(foo);
barRepository.save(bar);
fooRepository.delete(foo);
}
上面的测试失败了。我希望能够删除 Foo 而不必删除所有关联的 Bar 对象,因为在 OneToMany 关系上设置了级联。为什么会失败?
最佳答案
试试 @OneToMany(mappedBy = "foo", cascade = CascadeType.ALL, orphanRemoval = true)
关于java - 级联不适用于使用 Spring Data JPA 存储库进行删除,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42399567/