Java Hibernate级联删除依赖实体(多个一个一个)
项目中有实体帐户和服务(摘要)。服务有一个儿童班,押金。帐户类别代码:Java Hibernate级联删除依赖实体(多个一个一个),java,hibernate,jpa,one-to-many,hibernate-mapping,Java,Hibernate,Jpa,One To Many,Hibernate Mapping,项目中有实体帐户和服务(摘要)。服务有一个儿童班,押金。帐户类别代码: @Entity public class Account { private static Logger log = LogManager.getLogger(Account.class); @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private long id; @Column private double amount;
@Entity
public class Account {
private static Logger log = LogManager.getLogger(Account.class);
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column
private double amount;
@Column
private AccountType type;
@Column(name = "date_start")
private Date dateStart;
@Column(name = "date_end")
private Date dateEnd;
@Column(name = "in_rate")
private short inRate;
@ManyToOne
@JoinColumn(name = "client_id")
private Client client;
...
@MappedSuperclass
abstract public class Services {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
protected long id;
@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "from_acc_id")
protected Account fromAcc;
...
服务类别代码:
@Entity
public class Account {
private static Logger log = LogManager.getLogger(Account.class);
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private long id;
@Column
private double amount;
@Column
private AccountType type;
@Column(name = "date_start")
private Date dateStart;
@Column(name = "date_end")
private Date dateEnd;
@Column(name = "in_rate")
private short inRate;
@ManyToOne
@JoinColumn(name = "client_id")
private Client client;
...
@MappedSuperclass
abstract public class Services {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
protected long id;
@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name = "from_acc_id")
protected Account fromAcc;
...
此外,存款还有一个金额字段,但这并不重要:
@Entity
public class Deposit extends Services {
@Column
private double amount;
尝试删除Account实例时,如果存在来自Deposit的链接,则会出现错误:
2020-03-13 13:29:51 ERROR SqlExceptionHelper: 131 - ERROR: UPDATE or DELETE in the "account" table violates the foreign key constraint "fk8qcea1frw0og19kft1ltq9kf9" of the "deposit" table
Details: The key (id) = (1) still has links in the "deposit" table.
如何配置级联删除,以便在删除帐户记录时,自动删除存款记录?一般来说,注释@OnDelete有帮助。帐户类别没有更改。服务代码:
@MappedSuperclass
abstract public class Services {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
protected long id;
@ManyToOne(cascade = CascadeType.REFRESH)
@JoinColumn(name = "from_account_id")
@OnDelete(action = OnDeleteAction.CASCADE)
protected Account fromAcc;
...
存款实体在哪里?通过将OneToMany映射添加到您的帐户实体并在其上放置级联配置?@Gimby,它不起作用。