java - 使用 JPA 映射复合主键和外键

Question

我有两个表:A 和 B。两者都有一个复合主键。 B表的PK也是A表主键的外键。

当我尝试获取映射表 B 的类的实例时，出现此异常:

org.hibernate.TypeMismatchException

该应用程序是一个 Spring Boot 应用程序。源代码可在 Github 获取。

表B的代码来源为:

@Entity @Table(name="usuarios")
public class UsuarioEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @EmbeddedId @AttributeOverrides( {
        @AttributeOverride(name="perTipoUsu", column=@Column(name="per_tipo_usu", nullable=false) ), 
        @AttributeOverride(name="perCodUsu", column=@Column(name="per_cod_usu", nullable=false) ) } )
    private UsuarioPKEntity pk = null;

   @OneToOne @PrimaryKeyJoinColumn
   private PersonaRelEnity personaRel = null;

   private String nombre;

   ....
}

表A的代码来源为:

@Entity @Table(name="persona_rel")
public class PersonaRelEnity implements Serializable {

    private static final long serialVersionUID = 1L;

    @EmbeddedId
    private PersonaRelPKEntity id;

    private String persona;

   ....
}

这两个类都位于包:com.cairone.ejemplo01.entities

完整的日志输出为:

2016-09-21 12:28:24.505 ERROR 8568 --- [ main]
o.s.boot.SpringApplication : Application startup failed

java.lang.IllegalStateException: Failed to execute CommandLineRunner
  at     org.springframework.boot.SpringApplication.callRunner(SpringApplication.ja

va:809) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.callRunners(SpringApplication.j ava:790) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication. java:777) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:308) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1191 ) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1180 ) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] at com.cairone.ejemplo01.App.main(App.java:74) [classes/:na] Caused by: org.springframework.dao.InvalidDataAccessApiUsageException:
org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.cairone.ejemplo01.entities.PersonaRelEnity. Expected: class com.cairone.ejemplo01.entities.PersonaRelPKEntity, got class
com.cairone.ejemplo01.entities.UsuarioPKEntity; nested exception is
java.lang.IllegalArgumentException: org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.cairone.ejemplo01.entities.PersonaRelEnity. Expected: class com.cairone.ejemplo01.entities.PersonaRelPKEntity, got class com.cairone.ejemplo01.entities.UsuarioPKEntity at org.springframework.orm.jpa.EntityManagerFactoryUtils.convertJpaAccessExce ptionIfPossible(EntityManagerFactoryUtils.java:384) ~[spring-orm-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionI fPossible(HibernateJpaDialect.java:227) ~[spring-orm-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExce ptionIfPossible(AbstractEntityManagerFactoryBean.java:436) ~[spring-
orm-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.tran slateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:59) ~ [spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataA ccessUtils.java:213) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor .invoke(PersistenceExceptionTranslationInterceptor.java:147) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:179) ~[spring-aop-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProc essor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetad ataPostProcessor.java:131) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:179) ~[spring-aop-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(Exp oseInvocationInterceptor.java:92) ~[spring-aop-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(Refle ctiveMethodInvocation.java:179) ~[spring-aop-
4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopP roxy.java:208) ~[spring-aop-4.2.6.RELEASE.jar:4.2.6.RELEASE] at com.sun.proxy.$Proxy69.findAll(Unknown Source) ~[na:na] at com.cairone.ejemplo01.datasources.UsuarioDataSource.buscar(UsuarioDataSour ce.java:15) ~[classes/:na] at com.cairone.ejemplo01.App.run(App.java:33) [classes/:na] at org.springframework.boot.SpringApplication.callRunner(SpringApplication.ja va:806) [spring-boot-1.3.5.RELEASE.jar:1.3.5.RELEASE] ... 6 common frames omitted Caused by: java.lang.IllegalArgumentException: org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.cairone.ejemplo01.entities.PersonaRelEnity. Expected: class com.cairone.ejemplo01.entities.PersonaRelPKEntity, got class com.cairone.ejemplo01.entities.UsuarioPKEntity at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:455) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.criteria.compile.CriteriaQueryTypeQueryAdapter.getResultList(CriteriaQueryTypeQueryAdapter.java:67) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:323) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at org.springframework.data.jpa.repository.support.SimpleJpaRepository.findAll(SimpleJpaRepository.java:68) ~[spring-data-jpa-1.9.4.RELEASE.jar:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_74] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_74] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_74] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_74] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:483) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:468) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:440) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:61) ~[spring-data-commons-1.11.4.RELEASE.jar:na] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) ~[spring-aop-4.2.6.RELEASE.jar:4.2.6.RELEASE] at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136) ~[spring-tx-4.2.6.RELEASE.jar:4.2.6.RELEASE] ... 16 common frames omitted Caused by: org.hibernate.TypeMismatchException: Provided id of the wrong type for class com.cairone.ejemplo01.entities.PersonaRelEnity. Expected: class com.cairone.ejemplo01.entities.PersonaRelPKEntity, got class com.cairone.ejemplo01.entities.UsuarioPKEntity at org.hibernate.event.internal.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:134) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.internal.SessionImpl.fireLoad(SessionImpl.java:1106) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.internal.SessionImpl.internalLoad(SessionImpl.java:1025) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.type.EntityType.resolveIdentifier(EntityType.java:716) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.type.EntityType.resolve(EntityType.java:502) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.engine.internal.TwoPhaseLoad.doInitializeEntity(TwoPhaseLoad.java:170) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.engine.internal.TwoPhaseLoad.initializeEntity(TwoPhaseLoad.java:144) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.initializeEntitiesAndCollections(Loader.java:1115) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.processResultSet(Loader.java:973) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.doQuery(Loader.java:921) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:355) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.doList(Loader.java:2554) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.doList(Loader.java:2540) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2370) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.Loader.list(Loader.java:2365) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:497) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:236) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1300) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final] ... 34 common frames omitted

2016-09-21 12:28:24.508 INFO 8568 --- [ main] utoConfigurationReportLoggingInitializer :

Error starting ApplicationContext. To display the auto-configuration report enable debug logging (start with --debug)

2016-09-21 12:28:24.509  INFO 8568 --- [           main]     s.c.a.AnnotationConfigApplicationContext : Closing    

org.springframework.context.annotation.AnnotationConfigApplicationContext@ 24b1d79b: startup date [Wed Sep 21 12:28:21 ART 2016]; root of context hierarchy 2016-09-21 12:28:24.511 INFO 8568 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Unregistering JMX-exposed beans on shutdown 2016-09-21 12:28:24.513 INFO 8568 --- [ main] j.LocalContainerEntityManagerFactoryBean : Closing JPA
EntityManagerFactory for persistence unit 'default'

这是相关部分:

org.hibernate.TypeMismatchException:为 com.cairone.ejemplo01.entities.PersonaRelEnity 类提供了错误类型的 id。预期:类 com.cairone.ejemplo01.entities.PersonaRelPKEntity，获得类com.cairone.ejemplo01.entities.UsuarioPKEntity

Answer 1

这是一种“派生身份”，其中一个实体的主键派生自另一个相关实体的主键。

我还没有遇到过与这种关系完全相似的事情，但试试这个:

@Entity
@Table(name="persona_rel")
public class PersonaRelEnity implements Serializable {

    @EmbeddedId
    private PersonaRelPKEntity pk;

    ...
}

@Embeddable
public class PersonaRelPKEntity implements Serializable {

    private static final long serialVersionUID = 1L;

    @Column(name="per_tipo")
    private Integer perTipo;

    @Column(name="per_cod")
    private Integer perCod;

    ...
}

@Entity
@Table(name="usuarios")
public class UsuarioEntity implements Serializable {

    @EmbeddedId
    private UsuarioEntityPK id;

    @OneToOne
    @MapsId("personaRelPKEntity")
    @JoinColumns({
        @JoinColumn(name="per_tipo_usu", referencedColumnName="per_tipo"),
        @JoinColumn(name="per_cod_usu", referencedColumnName="per_cod")
    })
    private PersonaRelEnity personaRelEntity = null;

    ...
}

@Embeddable
public class UsuarioEntityPK implements Serializable {

    // matches the PK type of PersonaRelEnity
    private PersonaRelPKEntity personaRelPKEntity;

    ...
}

JPA 2.1 规范第 2.4.1 节讨论了派生身份。

旁注:类名 PersonaRelEnity 中有一个拼写错误(即 Entity 缺少第一个 t)。 :-)