JPA Ошибка выдачи объекта сущности

Question

У меня есть объект, называемый Студент, у которого есть StudentAccount. Связь равна 1: 1. Когда я обновить студент, вместо обновления, связанные детали StudentAccount, он создает новый StudentAccount и бросает:

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '4' for key 'UK_tr1t4oo8ivgiur0xy63odvvfy'

, потому что уже StudentAccount для студента с конкретным идентификатором. Что я делаю неправильно?

@Entity 
@Table 
public class StudentAccount implements DomainModel { 

    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private Integer idstudentaccount; 
    @OneToOne(optional = false) 
    @JoinColumn(name = "idstudent") 
    private Student student; 
    private String username; 
    private String password; 
    //getters and setters 
} 
    @Entity 
@Table(name = "student") 
public class Student implements DomainModel { 
    @Id 
    @GeneratedValue(strategy=GenerationType.AUTO) 
    private Integer idStudent; 
    private String firstname; 
    private String lastname; 
    @OneToOne(mappedBy = "student", cascade = CascadeType.ALL, targetEntity=StudentAccount.class) 
    private StudentAccount studentAccount; 
    //getters and setters 
} 


public class GenericDAOImpl<T extends DomainModel> implements GenericDAO<T> { 

    private Class<T> type; 
    protected EntityManager entityManager; 

    public GenericDAOImpl(Class<T> type) { 
     this.type = type; 
    } 

    @Transactional 
    public T getObjectById(Integer id) { 
     if (id == null) { 
      return null; 
     } else { 
      return getEntityManager().find(type, id); 
     } 
    } 

    @SuppressWarnings("unchecked") 
    @Transactional 
    public List<T> getAll() { 
     return getEntityManager().createQuery(
       "select o from " + type.getName() + " o ").getResultList(); 

    } 
    @Transactional 
    public void save(T object) { 
     entityManager.persist(object); 
    } 

    @Transactional 
    public T updateObject(T object) { 
     return getEntityManager().merge(object); 
    } 
    @Transactional 
    public void delete(T object) { 
     entityManager.remove(object); 
    } 

    public EntityManager getEntityManager() { 
     return entityManager; 
    } 

    @PersistenceContext(unitName="repository") 
    public void setEntityManager(EntityManager entityManager) { 
     this.entityManager = entityManager; 
    } 
} 

Весь трассировки стека:

com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry '4' for key 'UK_tr1t4oo8ivgiur0xy63odvvfy' 
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) 
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 
java.lang.reflect.Constructor.newInstance(Constructor.java:526) 
com.mysql.jdbc.Util.handleNewInstance(Util.java:406) 
com.mysql.jdbc.Util.getInstance(Util.java:381) 
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1015) 
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956) 
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3558) 
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3490) 
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1959) 
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2109) 
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2643) 
com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2077) 
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2362) 
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2280) 
com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2265) 
org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:208) 
org.hibernate.id.IdentityGenerator$GetGeneratedKeysDelegate.executeAndExtract(IdentityGenerator.java:96) 
org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:58) 
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3032) 
org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3558) 
org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:98) 
org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:490) 
org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:195) 
org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:179) 
org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:214) 
org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:324) 
org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:288) 
org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:194) 
org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:125) 
org.hibernate.jpa.event.internal.core.JpaMergeEventListener.saveWithGeneratedId(JpaMergeEventListener.java:73) 
org.hibernate.event.internal.DefaultMergeEventListener.saveTransientEntity(DefaultMergeEventListener.java:271) 
org.hibernate.event.internal.DefaultMergeEventListener.entityIsTransient(DefaultMergeEventListener.java:251) 
org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:189) 
org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:886) 
org.hibernate.internal.SessionImpl.merge(SessionImpl.java:868) 
org.hibernate.engine.spi.CascadingActions$6.cascade(CascadingActions.java:277) 
org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:350) 
org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:293) 
org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:161) 
org.hibernate.engine.internal.Cascade.cascade(Cascade.java:118) 
org.hibernate.event.internal.DefaultMergeEventListener.cascadeOnMerge(DefaultMergeEventListener.java:474) 
org.hibernate.event.internal.DefaultMergeEventListener.entityIsDetached(DefaultMergeEventListener.java:343) 
org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:186) 
org.hibernate.event.internal.DefaultMergeEventListener.onMerge(DefaultMergeEventListener.java:85) 
org.hibernate.internal.SessionImpl.fireMerge(SessionImpl.java:876) 
org.hibernate.internal.SessionImpl.merge(SessionImpl.java:858) 
org.hibernate.internal.SessionImpl.merge(SessionImpl.java:863) 
org.hibernate.jpa.spi.AbstractEntityManagerImpl.merge(AbstractEntityManagerImpl.java:1196) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:606) 
org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:291) 
com.sun.proxy.$Proxy32.merge(Unknown Source) 
com.af.dao.impl.GenericDAOImpl.updateObject(GenericDAOImpl.java:54) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:606) 
org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317) 
org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) 
org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:281) 
org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) 
org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) 
com.sun.proxy.$Proxy33.updateObject(Unknown Source) 
com.af.service.impl.StudentServiceImpl.updateStudent(StudentServiceImpl.java:50) 
com.af.controller.StudentController.editProfilePOST(StudentController.java:91) 
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:606) 
org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) 
org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:137) 
org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:110) 
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:777) 
org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:706) 
org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:943) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877) 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966) 
org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:647) 
org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:728) 
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51) 

Answer 1

Похоже, тот же студент (ID = 4) связан с StudentAccount более чем один раз, или наоборот. Судя по вашим аннотациям, вам нужно всего лишь сопоставление 1-1, поэтому проверьте свой дБ, чтобы увидеть, существует ли этот дубликат, я бы поспорил, что это так. После удаления дубликата проблема должна быть решена.