Google App EngineのDataNucleusのenhencer

Question

私はスーパー

@Entity 
@MappedSuperclass 
public class Location implements LocationCapable { 

    @Basic 
    private Double latitude; 

    @Basic 
    private Double longitude; 

    @Basic 
    private List<String> geocells; 

    @PrePersist 
    @Transient 
    private void generateGeoCells() { 
     geocells = GeocellManager.generateGeoCell(getLocation()); 
    } 

    public Double getLongitude() { 
     return longitude; 
    } 

    public void setLongitude(Double longitude) { 
     this.longitude = longitude; 
    } 

    public Double getLatitude() { 
     return latitude; 
    } 

    public void setLatitude(Double latitude) { 
     this.latitude = latitude; 
    } 

    @Override 
    @Transient 
    @JsonIgnore 
    public Point getLocation() { 
     return new Point(latitude, longitude); 
    } 

    @Override 
    @Transient 
    @JsonIgnore 
    public String getKeyString() { 
     return latitude + ":" + longitude; 
    } 

    @Override 
    public List<String> getGeocells() { 
     return geocells; 
    } 

    public void setGeocells(List<String> geocells) { 
     this.geocells = geocells; 
    } 

} 

そしてこの

から継承しかし、私はJUnitテストを実行しようとすると、私はこの

Caused by: org.datanucleus.metadata.InvalidMetaDataException: Class Location has application-identity and no objectid-class specified yet has 0 primary key fields. Unable to use SingleFieldIdentity. 
at org.datanucleus.metadata.AbstractClassMetaData.determineObjectIdClass(AbstractClassMetaData.java:1032) 
at org.datanucleus.metadata.ClassMetaData.populate(ClassMetaData.java:205) 
at org.datanucleus.metadata.AbstractClassMetaData.validateSuperClass(AbstractClassMetaData.java:720) 
at org.datanucleus.metadata.AbstractClassMetaData.determineSuperClassName(AbstractClassMetaData.java:642) 
at org.datanucleus.metadata.ClassMetaData.populate(ClassMetaData.java:193) 
at org.datanucleus.metadata.MetaDataManager$1.run(MetaDataManager.java:2317) 
at java.security.AccessController.doPrivileged(Native Method) 
at org.datanucleus.metadata.MetaDataManager.populateAbstractClassMetaData(MetaDataManager.java:2311) 
at org.datanucleus.metadata.MetaDataManager.populateFileMetaData(MetaDataManager.java:2148) 
at org.datanucleus.metadata.MetaDataManager.initialiseFileMetaDataForUse(MetaDataManager.java:864) 
at org.datanucleus.metadata.MetaDataManager.loadPersistenceUnit(MetaDataManager.java:794) 
at org.datanucleus.jpa.EntityManagerFactoryImpl.initialisePMF(EntityManagerFactoryImpl.java:488) 
at org.datanucleus.jpa.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:355) 
at org.datanucleus.store.appengine.jpa.DatastoreEntityManagerFactory.<init>(DatastoreEntityManagerFactory.java:63) 
at org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider.createEntityManagerFactory(DatastorePersistenceProvider.java:35) 
at javax.persistence.Persistence.createFactory(Persistence.java:172) 
... 67 more 

を得た別の一つとして、以下のクラスを持っていますまた、私は@ Idで注釈付きのキーフィールドをsupperclassに追加しようとしましたが、それは私のために結果を与えません。

Answer 1

メッセージには@Idフィールドが必要です。

Answer 2

プラグインを拡張したり、Eclipseプラグインを使用したり、IDEを再起動してもメーターを使用したりしていないようです。しかし、IDのこの問題だけです。実際に私は埋め込まれたエンティティに関連する別の非常に奇妙な問題に直面しました。私は、JUnitのテストケースを、次のしていることをテストするには

@Entity 
public class City { 
    @Id 
    @GeneratedValue(strategy = GenerationType.IDENTITY) 
    private Key id; 
    @Basic 
    private String name; 
    // Entity won't persist if location is not null, requires to persist with 
    // further update 
    @Embedded 
    // @OneToOne(cascade = CascadeType.ALL) it works the same when I add or remove this line 
    private Location location; 

    /* getters and setters */ 
} 

@Embeddable 
public class Location implements LocationCapable { 
    @Basic 
    @NotNull 
    private Double latitude; 
    @Basic 
    @NotNull 
    private Double longitude; 
    @Basic 
    private List<String> geocells; 

    /* getters and setters */ 
} 

：

@Test 
    public void testSave() throws Exception { 
     City city = new City("testCity1", new Location(1d, 1d)); 
     cityDao.persist(city); 
     assertNotNull(city.getId()); 
    } 

cityDao.persist(city)はjpaTemplate.persist(object);

そして私は、私は次しまったこのエンティティを永続化しようとしたときに、単にない私は、ドメインモデルを以下しています例外：

Caused by: java.lang.IllegalArgumentException: out of field index :-1 
    at com.myproject.model.Location.jdoProvideField(Location.java) 
    at org.datanucleus.state.JDOStateManagerImpl.provideField(JDOStateManagerImpl.java:2585) 
    at org.datanucleus.state.JDOStateManagerImpl.provideField(JDOStateManagerImpl.java:2555) 
    at org.datanucleus.store.mapped.mapping.CollectionMapping.postInsert(CollectionMapping.java:91) 
    at org.datanucleus.store.mapped.mapping.EmbeddedPCMapping.postInsert(EmbeddedPCMapping.java:104) 
    at org.datanucleus.store.appengine.DatastoreRelationFieldManager.runPostInsertMappingCallbacks(DatastoreRelationFieldManager.java:217) 
    at org.datanucleus.store.appengine.DatastoreRelationFieldManager.access$200(DatastoreRelationFieldManager.java:48) 
    at org.datanucleus.store.appengine.DatastoreRelationFieldManager$1.apply(DatastoreRelationFieldManager.java:116) 
    at org.datanucleus.store.appengine.DatastoreRelationFieldManager.storeRelations(DatastoreRelationFieldManager.java:81) 
    at org.datanucleus.store.appengine.DatastoreFieldManager.storeRelations(DatastoreFieldManager.java:955) 
    at org.datanucleus.store.appengine.DatastorePersistenceHandler.storeRelations(DatastorePersistenceHandler.java:546) 
    at org.datanucleus.store.appengine.DatastorePersistenceHandler.insertPostProcess(DatastorePersistenceHandler.java:304) 
    at org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObjects(DatastorePersistenceHandler.java:256) 
    at org.datanucleus.store.appengine.DatastorePersistenceHandler.insertObject(DatastorePersistenceHandler.java:240) 
    at org.datanucleus.state.JDOStateManagerImpl.internalMakePersistent(JDOStateManagerImpl.java:3185) 
    at org.datanucleus.state.JDOStateManagerImpl.flush(JDOStateManagerImpl.java:4513) 
    at org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:2814) 
    at org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java:2754) 
    at org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java:2893) 
    at org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java:369) 
    at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:256) 
    at org.datanucleus.jpa.EntityTransactionImpl.commit(EntityTransactionImpl.java:104) 
    at org.datanucleus.store.appengine.jpa.DatastoreEntityTransactionImpl.commit(DatastoreEntityTransactionImpl.java:55) 
    at org.springframework.orm.jpa.JpaTransactionManager.doCommit(JpaTransactionManager.java:467) 
    ... 41 more