为什么hibernate想要插入一个具有相同密钥的新实体（如果它已经存在）？

时间：2016-11-22 07:48:49

标签： java hibernate jpa spring-boot

我遇到以下问题。我把我的例子推到了GitHub。

如果我想要保留我的类router.route('/appointment') .post(function(req, res) { var appointmentData = req.body; var appointments = new Appointment(appointmentData); console.log(appointments); appointments.save(function(err, appointment) { if (err) throw err; res.json(appointment); }) }) 的实例，那么Hibernate会尝试创建一个我不想要的PlayerStatistics（指定为Matchday）的现有实体，但我似乎没有绕过它。

我坚持使用@ManyToOne的{​​{1}}方法。

init

如果我像上面那样，那么我得到以下异常。

DemoApplicationTests

如果我调试HQL，我可以清楚地看到Hibernate想要在表@Before public void init() { final Matchday matchday = matchdayRepository.save(new Matchday(1)); final Club club1 = clubRepository.save(new Club("Klub1")); final Club club2 = clubRepository.save(new Club("Klub2")); final Match match = matchRepository.save(new Match(matchday, club1, club2)); final Player player = playerRepository.save(new Player(1, "Jan", "Kowalski", club1)); playerStatisticsRepository.save(new PlayerStatistics(matchday, player, match)); } 中插入一个新行，即使它已经存在。

org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [SYS_PK_10114]; nested exception is org.hibernate.exception.ConstraintViolationException: could not execute statement
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:278)
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:244)
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:521)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:761)
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:730)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:504)
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:292)
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:136)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:133)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)
    at com.sun.proxy.$Proxy102.save(Unknown Source)
    at com.example.DemoApplicationTests.init(DemoApplicationTests.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:252)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:94)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:191)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Caused by: org.hibernate.exception.ConstraintViolationException: could not execute statement
    at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:59)
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42)
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111)
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97)
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207)
    at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:45)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2934)
    at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3434)
    at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:89)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:582)
    at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:456)
    at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:337)
    at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:39)
    at org.hibernate.internal.SessionImpl.doFlush(SessionImpl.java:1407)
    at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:477)
    at org.hibernate.internal.SessionImpl.flushBeforeTransactionCompletion(SessionImpl.java:3170)
    at org.hibernate.internal.SessionImpl.beforeTransactionCompletion(SessionImpl.java:2384)
    at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.beforeTransactionCompletion(JdbcCoordinatorImpl.java:467)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.beforeCompletionCallback(JdbcResourceLocalTransactionCoordinatorImpl.java:146)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl.access$100(JdbcResourceLocalTransactionCoordinatorImpl.java:38)
    at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.commit(JdbcResourceLocalTransactionCoordinatorImpl.java:220)
    at org.hibernate.engine.transaction.internal.TransactionImpl.commit(TransactionImpl.java:68)
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:517)
    ... 44 more
Caused by: java.sql.SQLIntegrityConstraintViolationException: integrity constraint violation: unique constraint or index violation; SYS_PK_10114 table: MATCHDAY
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.fetchResult(Unknown Source)
    at org.hsqldb.jdbc.JDBCPreparedStatement.executeUpdate(Unknown Source)
    at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204)
    ... 62 more
Caused by: org.hsqldb.HsqlException: integrity constraint violation: unique constraint or index violation; SYS_PK_10114 table: MATCHDAY
    at org.hsqldb.error.Error.error(Unknown Source)
    at org.hsqldb.Constraint.getException(Unknown Source)
    at org.hsqldb.index.IndexAVLMemory.insert(Unknown Source)
    at org.hsqldb.persist.RowStoreAVL.indexRow(Unknown Source)
    at org.hsqldb.TransactionManager2PL.addInsertAction(Unknown Source)
    at org.hsqldb.Session.addInsertAction(Unknown Source)
    at org.hsqldb.Table.insertSingleRow(Unknown Source)
    at org.hsqldb.StatementDML.insertSingleRow(Unknown Source)
    at org.hsqldb.StatementInsert.getResult(Unknown Source)
    at org.hsqldb.StatementDMQL.execute(Unknown Source)
    at org.hsqldb.Session.executeCompiledStatement(Unknown Source)
    at org.hsqldb.Session.execute(Unknown Source)
    ... 65 more

如果我评论Matchday方法的最后一行，那么它就可以了，所以问题必须出在这一部分：Hibernate: insert into Matchday (matchdayNumber) values (?) 

init()

我在这里做错了什么？

playerStatisticsRepository.save(new PlayerStatistics(matchday, player, match))课程就是这样。

@Before
public void init() {
    final Matchday matchday = matchdayRepository.save(new Matchday(1));
    final Club club1 = clubRepository.save(new Club("Klub1"));
    final Club club2 = clubRepository.save(new Club("Klub2"));
    final Match match = matchRepository.save(new Match(matchday, club1, club2));
    final Player player = playerRepository.save(new Player(1, "Jan", "Kowalski", club1)); 
    //playerStatisticsRepository.save(new PlayerStatistics(matchday, player, match));
}

修改

如果我想直接从PlayerStatistics实体管理它。然后我收到一个例外，即该实体已经与会话相关联，而它似乎不是。

@Entity
@IdClass(PlayerStatisticsId.class)
public class PlayerStatistics implements Serializable {
    //...
    @Id
    @ManyToOne(optional = false)
    @PrimaryKeyJoinColumn
    private Player player;

    @Id
    @ManyToOne(optional = false)
    @PrimaryKeyJoinColumn
    private Matchday matchday;

    @ManyToOne(optional = false)
    @JoinColumns({ @JoinColumn(name = "matchday_matchdaynumber", referencedColumnName = "matchday_matchdaynumber"),
            @JoinColumn(name = "hometeam_name", referencedColumnName = "hometeam_name") })
    private Match match;

    @Column(nullable = false)
    private boolean playedFromTheFirstWhistleblow;

    @Min(0)
    @Column(nullable = false)
    private int enteredTheFieldAtInSeconds;

    @Min(0)
    @Column(nullable = false)
    private int leftTheFieldAtInSeconds;

    @ElementCollection(fetch = FetchType.EAGER)
    @CollectionTable
    @MapKeyEnumerated(EnumType.STRING)
    private Map<ScoreType, Integer> statistics = new HashMap<>();

    //...
}

Player

1 个答案:

答案 0 :(得分：0)

这里的问题出在PlayerStatisticsId以及它的定义方式。

最初它看起来像这样。

public class PlayerStatisticsId implements Serializable {
    //..
    private long player;

    private int matchday;

    public long getPlayer() {
        return player;
    }

    public int getMatchday() {
        return matchday;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof PlayerStatisticsId) {
            final PlayerStatisticsId o = (PlayerStatisticsId) obj;
            return o.matchday == matchday && o.player == player;
        } else {
            return false;
        }
    }
}

我本可以发誓，我在某处读到只有基元/基本类型可以用在@ClassId的类中。但情况似乎并非如此。

将其更改为

public class PlayerStatisticsId implements Serializable {
    //...

    private Player player;

    private Matchday matchday;

    public Player getPlayer() {
        return player;
    }

    public Matchday getMatchday() {
        return matchday;
    }

    @Override
    public boolean equals(Object obj) {
        if (obj == this) {
            return true;
        }
        if (obj instanceof PlayerStatisticsId) {
            final PlayerStatisticsId o = (PlayerStatisticsId) obj;
            return o.matchday.equals(matchday) && o.player.equals(player);
        } else {
            return false;
        }
    }
}

它确实有效。我现在收到一个完全不同的例外，但这是一个单独的问题。

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