JPA: ManyToMany Mapping Exception

У меня есть связь между двумя постоянными объектами Traveller и Address. Каждый путешественник должен иметь 3 адреса: настоящее, постоянное и адресное лицо. Я попробовал этот код:JPA: ManyToMany Mapping Exception

Traveller Entity:

@ManyToMany(mappedBy = "travellers") 
private Address presentAdd, permanentAdd, refPersonAdd;

Address Entity:

@ManyToMany 
private List<Traveller> travellers;

Но это исключение показано:

Grave: Exception while invoking class org.glassfish.persistence.jpa.JPADeployer prepare 
method 
Grave: Exception while preparing the app 
Grave: Exception [EclipseLink-28018] (Eclipse Persistence Services - 2.3.2.v20111125- 
r10461): org.eclipse.persistence.exceptions.EntityManagerSetupException 
Exception Description: Predeployment of PersistenceUnit [visasMarketingPU] failed. 
Internal Exception: Exception [EclipseLink-7214] (Eclipse Persistence Services - 
2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.ValidationException 
Exception Description: The target entity of the relationship attribute [permanentAdd] on 
the class [class com.gis.visasmarketing.entities.Traveller] cannot be determined. When 
not using generics, ensure the target entity is defined on the relationship mapping. 
javax.persistence.PersistenceException: Exception [EclipseLink-28018] (Eclipse 
Persistence Services - 2.3.2.v20111125-r10461): 
org.eclipse.persistence.exceptions.EntityManagerSetupException 
Exception Description: Predeployment of PersistenceUnit [visasMarketingPU] failed. 
Internal Exception: Exception [EclipseLink-7214] (Eclipse Persistence Services - 
2.3.2.v20111125-r10461): org.eclipse.persistence.exceptions.ValidationException 
Exception Description: The target entity of the relationship attribute [permanentAdd] on 
the class [class com.gis.visasmarketing.entities.Traveller] cannot be determined. When 
not using generics, ensure the target entity is defined on the relationship 
mapping.  
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl. 
predeploy(EntityManagerSetupImpl.java:1402) 
at org.eclipse.persistence.jpa.PersistenceProvider. 
createContainerEntityManagerFactory(PersistenceProvider.java:208) 
at org.glassfish.persistence.jpa.PersistenceUnitLoader. 
loadPU(PersistenceUnitLoader.java:206) 
at org.glassfish.persistence.jpa.PersistenceUnitLoader.<init> 
(PersistenceUnitLoader.java:120) 
at org.glassfish.persistence.jpa.JPADeployer$1.visitPUD(JPADeployer.java:224) 
at org.glassfish.persistence.jpa.JPADeployer$PersistenceUnitDescriptorIterator. 
    iteratePUDs(JPADeployer.java:495) 
at org.glassfish.persistence.jpa.JPADeployer.createEMFs(JPADeployer.java:233) 
at org.glassfish.persistence.jpa.JPADeployer.prepare(JPADeployer.java:168) 
at com.sun.enterprise.v3.server.ApplicationLifecycle. 
    prepareModule(ApplicationLifecycle.java:871) 
at com.sun.enterprise.v3.server.ApplicationLifecycle. 
    deploy(ApplicationLifecycle.java:410) 
at com.sun.enterprise.v3.server.ApplicationLifecycle. 
    deploy(ApplicationLifecycle.java:240) 
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl$1. 
    execute(CommandRunnerImpl.java:348) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl. 
    doCommand(CommandRunnerImpl.java:363) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl. 
    doCommand(CommandRunnerImpl.java:1085) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl. 
    access$1200(CommandRunnerImpl.java:95) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext. 
    execute(CommandRunnerImpl.java:1291) 
at com.sun.enterprise.v3.admin.CommandRunnerImpl$ExecutionContext. 
    execute(CommandRunnerImpl.java:1259) 
at com.sun.enterprise.v3.admin.AdminAdapter.doCommand(AdminAdapter.java:461) 
at com.sun.enterprise.v3.admin.AdminAdapter.service(AdminAdapter.java:212) 
at com.sun.grizzly.tcp.http11.GrizzlyAdapter.service(GrizzlyAdapter.java:179) 
at com.sun.enterprise.v3.server.HK2Dispatcher.dispath(HK2Dispatcher.java:117) 
at com.sun.enterprise.v3.services.impl.ContainerMapper$Hk2DispatcherCallable. 
    call(ContainerMapper.java:354) 
at com.sun.enterprise.v3.services.impl.ContainerMapper. 
    service(ContainerMapper.java:195) 
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860) 
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757) 
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056) 
at com.sun.grizzly.http.DefaultProtocolFilter. 
    execute(DefaultProtocolFilter.java:229) 
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter 
    (DefaultProtocolChain.java:137) 
at com.sun.grizzly.DefaultProtocolChain. 
    execute(DefaultProtocolChain.java:104) 
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90) 
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79) 
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54) 
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59) 
at com.sun.grizzly.ContextTask.run(ContextTask.java:71) 
at com.sun.grizzly.util.AbstractThreadPool$Worker. 
    doWork(AbstractThreadPool.java:532) 
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513) 
at java.lang.Thread.run(Thread.java:744) 
    Caused by: Exception [EclipseLink-28018] 
    (Eclipse Persistence Services - 2.3.2.v20111125-r10461): 
    org.eclipse.persistence.exceptions.EntityManagerSetupException 
    Exception Description: Predeployment of PersistenceUnit 
    [visasMarketingPU] failed. 
    Internal Exception: Exception [EclipseLink-7214] 
    (Eclipse Persistence Services - 2.3.2.v20111125-r10461): 
    org.eclipse.persistence.exceptions. 
    ValidationException 
    Exception Description: The target entity of the relationship attribute 
    [permanentAdd] on the class [class com.gis.visasmarketing.entities.Traveller] 
    cannot be determined. When not using generics, ensure the target entity 
    is defined on the relationship mapping. 
at org.eclipse.persistence.exceptions.EntityManagerSetupException. 
    predeployFailed(EntityManagerSetupException.java:221) 
... 38 more 
Caused by: Exception [EclipseLink-7214] 
(Eclipse Persistence Services - 2.3.2.v20111125-r10461): 
org.eclipse.persistence.exceptions.ValidationException 
Exception Description: The target entity of the relationship attribute 
[permanentAdd] on the class [class com.gis.visasmarketing.entities.Traveller] 
cannot be determined. When not using generics, ensure the target entity is defined 
on the relationship mapping. 
at org.eclipse.persistence.exceptions.ValidationException. 
unableToDetermineTargetEntity(ValidationException.java:1959) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings. 
CollectionAccessor.getReferenceClass(CollectionAccessor.java:458) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
ClassAccessor.addAccessor(ClassAccessor.java:277) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
ClassAccessor.addAccessorFields(ClassAccessor.java:415) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
ClassAccessor.addAccessors(ClassAccessor.java:387) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
ClassAccessor.preProcess(ClassAccessor.java:1134) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
MappedSuperclassAccessor.preProcess(MappedSuperclassAccessor.java:682) 
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes. 
EntityAccessor.preProcess(EntityAccessor.java:554) 
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject. 
processStage1(MetadataProject.java:1608) 
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor. 
processORMMetadata(MetadataProcessor.java:531) 
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor. 
processORMetadata(PersistenceUnitProcessor.java:526) 
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl. 
predeploy(EntityManagerSetupImpl.java:1337) 
... 37 more

Пожалуйста, мне нужна ваша помощь

источник

2014-01-04 Reem

я определил атрибуты, как это в моем Traveller Entity:

private Address presentAdd, permanentAdd, refPersonAddTun, refPersonAddThai;

и в Address лица:

private Traveller traveller;

источник

2014-01-06 07:46:16 Reem

Итак, у адреса есть один путешественник? Если это текущее текущее предложение путешественника, вы можете захотеть использовать MappedBy с одной стороны. В противном случае обе стороны имеют внешний ключ к другому, который не нужен, и будет больно поддерживать, когда он изменится. – Chris

Вы не можете определить многие для многих, как это. Однако то, что вы пытаетесь сделать, может быть достигнуто

Изменение в вашей организации путешественника;

@ManyToMany(mappedBy = "travellers") 
private List<Address> addresses;

и добавление AddressType (предпочтительно Enum) в вас AddressType:

private AddressType type; 


public Enum AddressType{ 
    PRESENT,PERMANENT,REFERENCE_PERSON 

}

источник

2014-01-04 16:44:49 dhamibirendra

спасибо за ответ, но адрес должен быть сущностью с четырьмя атрибутами. – Reem

JPA: ManyToMany Mapping Exception

ответ

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