java - 使用关联注释的表的复合键

Question

我是hibernate的新手，我正在尝试实现一个使用此架构的基本应用程序(它不遵循我只是为了清楚起见而使用它的符号)

这是我的类(class)

@Entity
@Table(name = "race")
public class Race {
    @Id
    @GeneratedValue
    private UUID id;
    private String name;
}

@Entity
@Table(name="np_character")
public class NPCharacter {
    @Id
    @GeneratedValue
    private UUID id;
    @OneToOne
    private Race race;
    private String name;
    private int age;
}

@Entity
@Table(name="main_female_character")
public class MainFemaleCharacter {
    @Id
    @GeneratedValue
    private UUID id;
    @OneToOne
    private Race race;
    private String name;
    private int age;
}

@Entity
@Table(name="copulation_registry")
public class CopulationRegistry {
    // ??
    private NPCharacter npCharacter;
    // ??
    private MainFemaleCharacter femCharacter;
    private int times;
}

但是我遇到了 copulation_registry 类的问题。我到处使用 OneToOne 注释，而不是使用对键的引用。但我应该在这里做什么？ id_femPlayer 和 id_npCharacter 对是唯一的。

我应该使用 EmbeddedId 注释还是可以以某种方式使用关联注释来表示相同的关系？

Answer 1

You can annotate class CopulationRegistry with @IdClass

@Entity
@IdClass(CopulationRegistryKey.class)
@Table(name="copulation_registry")
public class CopulationRegistry {
    @Id
    private NPCharacter npCharacter;
    @Id
    private MainFemaleCharacter femCharacter;
    private int times;
}


public class CopulationRegistryKey{
    private NPCharacter npCharacter;
    private MainFemaleCharacter femCharacter;
}