Question

我有以下模型类：

@Entity
@Inheritance
public abstract class BasePage {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Long id;

    @OneToMany(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
    @MapKey(name="locale")
    private Map<String, Localized> text = new HashMap<String, Localized>();

    @OneToMany(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
    @MapKey(name="locale")
    private Map<String, Localized> title = new HashMap<String, Localized>();

    // ....
}

@Entity
public class Localized {
    @Id
    @GeneratedValue(strategy=GenerationType.AUTO)
    private Long id;

    private String locale;

    @Lob
    @Type(type="org.hibernate.type.StringClobType")
    private String text;

    @Lob
    @Type(type="org.hibernate.type.StringClobType")
    private String synopsis;

    // ....
}

@Entity
@DiscriminatorValue("FLATPAGE")
public class FlatPage {
}

@Entity
@DiscriminatorValue("INSTITUTION")
public class Institution {
    @OneToMany(fetch=FetchType.LAZY, cascade=CascadeType.ALL)
    @MapKey(name="locale")
    private Map<String, Localized> contact;
}

到目前为止，我有一个小的Entity类来保存本地化（HTML）字符串和一个抽象类，它是我的应用程序中特定类型的节点/文章的基础。为实体生成的SQL看起来不错，但是我将表BasePage实体映射到Localized个实体的表存在问题。

使用Hibernate（4.3.4）和PostgreSQL（9.1），生成以下模式：

CREATE TABLE basepage_localized
(
    basepage_id BIGINT NOT NULL,
    contact_id BIGINT NOT NULL,
    synopsis_id BIGINT NOT NULL,
    text_id BIGINT NOT NULL,
    PRIMARY KEY ( basepage_id, synopsis_id ),
    FOREIGN KEY ( basepage_id ) REFERENCES basepage ( id ),
    FOREIGN KEY ( text_id ) REFERENCES localized ( id ),
    FOREIGN KEY ( contact_id ) REFERENCES localized ( id ),
    FOREIGN KEY ( synopsis_id ) REFERENCES localized ( id )
);

问题在于我无法创建FlatPage个实体，因为contact_id具有NOT NULL约束。我怀疑我的架构可能会有更多问题，但那是我目前正在努力解决的问题......

抽象类中的@OneToMany生成不可用的模式

0 个答案: