休眠@OneToOne孩子不坚持

Question

我有一个 Stock 实体，它有 2 个子实体，stock 只能是车辆或财产，不能同时是两者，stock 定义如下：

@RooJavaBean
@RooToString
@RooJpaActiveRecord
public class Stock {

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

    @Version
    @Column(name = "version")
    private Integer version;

    ...

    @OneToOne(mappedBy = "stock", cascade = CascadeType.ALL)
    private StockProperty property;
    private Boolean isProperty;

    @OneToOne(mappedBy = "stock", cascade = CascadeType.ALL)
    private StockVehicle vehicle;
    private Boolean isVehicle;

    ....

}

然后是子实体StockProperty：

@RooJavaBean
@RooToString
@RooJpaActiveRecord
public class StockProperty {

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

    @Version
    @Column(name = "version")
    private Integer version;

    ....

    @PrimaryKeyJoinColumn
    @OneToOne(cascade = CascadeType.ALL)
    private Stock stock;

    ... more fields containing property details

}

StockVehicle 遵循完全相同的模式：

@RooJavaBean
@RooToString
@RooJpaActiveRecord
public class StockVehicle {

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

    @Version
    @Column(name = "version")
    private Integer version;

    ....

    @PrimaryKeyJoinColumn
    @OneToOne(cascade = CascadeType.ALL)
    private Stock stock;

    ... more fields containing vehicle details

}

当试图链接两者时，它在数据库中总是为空：

Stock stock = new Stock();
stock.setProperty(new StockProperty());
stock.getProperty().persist();
stock.persist();

或者反过来说，两边都是空的：

Stock stock = new Stock();

... fill in stock details

StockProperty property = new StockProperty();
property.setStock(stock);
... fill in property details

stock.setProperty(property);
stock.persist();

property.persist();

我没有在日志中看到任何错误，但链接永远不会发生：

Stock 的属性字段全部为空：

StockProperty 的股票字段全部为空：

我正在尝试实现级联删除，所以当我删除 Stock 时，它必须删除 StockProperty，如果可能的话，也可以反过来，否则我会将其设为单向引用。

按要求更新 SQL：

Hibernate: insert into stock (account, company, created, full_description, ..., is_property, is_vehicle, modified, version) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)

Hibernate: select last_insert_id()

Hibernate: insert into stock_property (created, modified, ... , version) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)

Hibernate: select last_insert_id()

我没有看到股票插入 sql 中的属性字段，我也没有看到 stock_property 的插入 sql 中的股票字段。

Answer 1

在 StockProperty 上试试这个：

@OneToOne(cascade = CascadeType.ALL)
@JoinColumn(name = "idStock", nullable = false)
private Stock stock;

还有这个库存：

@OneToOne(mappedBy="stock")
private StockProperty stockProperty;