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EmbeddedId的Hibernate标准

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我有我的实体:

@Entity
@Table(name="performances")
@AssociationOverrides({
    @AssociationOverride(name="id.player", joinColumns=@JoinColumn(name="player_id")),
    @AssociationOverride(name="id.season", joinColumns=@JoinColumn(name="season_id"))
})
public class Performance extends AbstractEntity<PerformanceID> {

    private static final long serialVersionUID = 1L;

    @EmbeddedId
    @Getter @Setter
    private PerformanceID id;
    @Getter @Setter
    private int goals;

    public Player getPlayer(){
        return id.getPlayer();
    }

    public Season getSeason(){
        return id.getSeason();
    }

和:

@Embeddable
public class PerformanceID implements Serializable {

    private static final long serialVersionUID = 1L;

    @ManyToOne(fetch=FetchType.LAZY, targetEntity=Player.class)
    @JoinColumn(name="player_id")
    @Getter @Setter
    private Player player;
    @ManyToOne(fetch=FetchType.LAZY, targetEntity=Season.class)
    @JoinColumn(name="season_id")
    @Getter @Setter
    private Season season;

如何选择玩家名称为“Claudio”的演出记录?在HQL中,它只是工作:

Query query = getSession().createQuery("from Performance where id.player.name = 'Claudio'");
return query.list();

但我需要通过Criteria API来实现 . 以下代码将失败:

Criteria criteria = getSession().createCriteria(Performance.class);
criteria.add(Restrictions.ilike("id.player.name", "Claudio"));
return criteria.list();

org.hibernate.QueryException:无法解析org.hibernate.persister.entity.AbstractPropertyMapping.propertyException(AbstractPropertyMapping.java:83)中的属性:id.player.name:pl.andrzejcichon.criterionlazydatamodel.entities.Performance . hagnate.persister.entity.AbstractPropertyMapping.toColumns(AbstractPropertyMapping.java:98)org.hibernate.persister.entity.BasicEntityPropertyMapping.toColumns(BasicEntityPropertyMapping.java:61)at org.hibernate.persister.entity.AbstractEntityPersister.toColumns(AbstractEntityPersister . 的java:1912)在org.hibernate.loader.criteria.CriteriaQueryTranslator.getColumns(CriteriaQueryTranslator.java:523)在org.hibernate.loader.criteria.CriteriaQueryTranslator.findColumns(CriteriaQueryTranslator.java:538)在org.hibernate.criterion.LikeExpression org.hibernate.loader.criteria.CriteriaJoinWal上的org.hibernate.loader.criteria.CriteriaQueryTranslator.getWhereCondition(CriteriaQueryTranslator.java:419)中的.toSqlString(LikeExpression.java:80) ker . (CriteriaJoinWalker.java:123)位于org.hibernate的org.hibernate.loader.criteria.CriteriaJoinWalker . (CriteriaJoinWalker.java:92)org.hibernate.loader.criteria.CriteriaLoader . (CriteriaLoader.java:93) . internal.SessionImpl.list(SessionImpl.java:1599)在org.hibernate.internal.CriteriaImpl.list(CriteriaImpl.java:374)在pl.andrzejcichon.criterionlazydatamodel.repository.impl.PerformanceDatabaseRepository.customList(PerformanceDatabaseRepository.java:29)位于sun.reflect的sun.reflect.NativeMethodAccessorImpl.invoke(未知来源)的sun.reflect.NativeMethodAccessorImpl.invoke0(本地方法)中的pl.andrzejcichon.criterionlazydatamodel.repository.impl.PerformanceDatabaseRepositoryTest.test(PerformanceDatabaseRepositoryTest.java:24) . 在org.junit.internal.runners的org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall(FrameworkMethod.java:45)的java.lang.reflect.Method.invoke(未知来源)中委托MethodAethodAccessorImpl.invoke(未知来源) . model.ReflectiveCallable.run(Reflecti veCallable.java:15)atg.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)在org.springframework的org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20) org.springframework.test.context上的org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)中的.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)位于org.unring.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java)的org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)中的.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72) :47)org.junit.runners.ParentRunner $ 3.run(ParentRunner.java:231)org.junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:60)at org.junit.runners.ParentRunner.runChildren( ParentRunner.java:229)org.junit.runners.ParentRunner.access $ 000(ParentRunner.j AVA:50)维持在org.springframework org.junit.runners.ParentRunner $ 2.evaluate(ParentRunner.java:222)在org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) . test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)在org.junit.runners.ParentRunner.run(ParentRunner.java:300)在org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run( SpringJUnit4ClassRunner.java:174)在org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)在org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java: 38)在在组织在org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) org.eclipse.jdt.internal.junit.runner.RemoteTes中的.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) tRunner.main(RemoteTestRunner.java:197)

另一个尝试:

Criteria criteria = createCriteria();
criteria.createAlias("id.player", "player");
criteria.add(Restrictions.ilike("player.name", "Claudio"));
return criteria.list();

会生成查询:

Hibernate:选择this_.player_id作为player2_1_0_,this_.season_id作为season3_1_0_,this_.goals作为goals1_0_来自表演this_player1_.name ilike?

但是它会因SQLGrammarException而失败:“表player1的缺少FROM子句”

1 回答

  • 0

    您的映射不正确 . EmbeddableId 类应包含 @Id (因此 Serializable )值,而不是映射或复杂类型 . 您应该将映射移动到实体类,然后仅在 EmbbedableId 类中包含它们的id . 请参阅以下示例(来自JPA 2.2规范)

    @Embeddable
    public class DependentId {
        String name;
        long empPK;   // corresponds to PK type of Employee
    }
    
    @Entity
    public class Dependent {
        @EmbeddedId DependentId id;
    
        // id attribute mapped by join column default
        @MapsId("empPK") // maps empPK attribute of embedded id
        @ManyToOne Employee emp;
    }
    

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