Hibernate:映射对子表的替代/天然钥匙列的错误?
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26-10-2019 - |
题
最初的问题源于这个问题:
为什么此JPA 2.0映射给我Eclipse/JBoss工具的错误?
如您所见,该星座还吓坏了Eclipse Dali JPA验证器。 JPA规格似乎允许此处看到(有些可靠):
第一个问题中发布的确切代码还提出了Hibernate MappingException:
Exception in thread "main" javax.persistence.PersistenceException: [PersistenceUnit: geoareas] Unable to configure EntityManagerFactory
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:374)
at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:56)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48)
at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32)
at tld.geoareas.Main.main(Main.java:69)
Caused by: org.hibernate.MappingException: property [_tld_geoareas_model_Zip__identifierMapper.country] not found on entity [tld.geoareas.model.Country]
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:378)
at org.hibernate.cfg.annotations.TableBinder.bindFk(TableBinder.java:414)
at org.hibernate.cfg.ToOneFkSecondPass.doSecondPass(ToOneFkSecondPass.java:115)
at org.hibernate.cfg.Configuration.processEndOfQueue(Configuration.java:1550)
at org.hibernate.cfg.Configuration.processFkSecondPassInOrder(Configuration.java:1473)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1389)
at org.hibernate.cfg.Configuration.buildMappings(Configuration.java:1345)
at org.hibernate.ejb.Ejb3Configuration.buildMappings(Ejb3Configuration.java:1477)
at org.hibernate.ejb.EventListenerConfigurator.configure(EventListenerConfigurator.java:193)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:1096)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:278)
at org.hibernate.ejb.Ejb3Configuration.configure(Ejb3Configuration.java:362)
... 4 more
Caused by: org.hibernate.MappingException: property [_tld_geoareas_model_Zip__identifierMapper.country] not found on entity [tld.geoareas.model.Country]
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:424)
at org.hibernate.mapping.PersistentClass.getRecursiveProperty(PersistentClass.java:375)
... 15 more
我对“递归财产”感到特别恼火。毕竟,这只是一个简单的单列引用,对地球群落桌国家的独特而不是零炭(2)列。请注意,继承可能在这里产生一定的影响,但恕我直言,它仍然不是过于复杂的。
那么,这是一个冬眠的错误吗?
解决方案
回答我自己的问题:
这不是冬眠中的错误。这是JPA 2.0规格,禁止在同时用作派生标识符时对非PK列的引用。有关更多详细信息,请参阅我的其他答案:
为什么此JPA 2.0映射给我Eclipse/JBoss工具的错误?
请注意,它还引起了Eclipselink的映射异常(您只需获得更有意义的堆栈跟踪):
Exception Description: The derived composite primary key attribute [country] of type [java.lang.String] from [tld.geoareas.model.ZipId] should be of the same type as its parent id field from [tld.geoareas.model.Country]. That is, it should be of type [java.lang.Integer].
at org.eclipse.persistence.exceptions.ValidationException.invalidDerivedCompositePKAttribute(ValidationException.java:1134)
at org.eclipse.persistence.internal.jpa.metadata.MetadataDescriptor.validateDerivedPKClassId(MetadataDescriptor.java:1817)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.ObjectAccessor.processId(ObjectAccessor.java:450)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.ObjectAccessor.processOwningMappingKeys(ObjectAccessor.java:659)
at org.eclipse.persistence.internal.jpa.metadata.accessors.mappings.ManyToOneAccessor.process(ManyToOneAccessor.java:110)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.ClassAccessor.processDerivedId(ClassAccessor.java:1409)
at org.eclipse.persistence.internal.jpa.metadata.accessors.classes.EntityAccessor.processDerivedId(EntityAccessor.java:823)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processAccessorsWithDerivedIDs(MetadataProject.java:1294)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProject.processStage3(MetadataProject.java:1560)
at org.eclipse.persistence.internal.jpa.metadata.MetadataProcessor.processORMMetadata(MetadataProcessor.java:484)
at org.eclipse.persistence.internal.jpa.deployment.PersistenceUnitProcessor.processORMetadata(PersistenceUnitProcessor.java:453)
at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.predeploy(EntityManagerSetupImpl.java:1080)
... 6 more
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