EclipseLink-93異常說明：表[項目]不存在於此描述符中

Question

我最近對已運行一年左右的JPA應用程序進行了一些更改。我添加了幾個新表，並遇到了一些問題。我無法發佈我的模式的圖像，因爲我沒有10個帖子，但我有一個項目表和一個產品表。許多產品可以有相同的項目，以便在產品表有一個ITEM_ID

以下是我的項目實體

@Entity 
@Table(name="item") 
public class Item implements Serializable { 
private static final long serialVersionUID = 1L; 

@Id 
private Integer _id; 

private Double carbonValue; 

private String description; 

private String name; 

private Integer discount; 

@OneToMany(mappedBy="item") 
private Collection<Product> products; 

// getters and setters etc 

這裏是我的產品實體

@Entity 
@Table(name="product") 
public class Product implements Serializable { 
private static final long serialVersionUID = 1L; 

@Id 
private Integer _id; 

private Integer deleted; 

@ManyToOne(fetch = FetchType.LAZY) 
@JoinColumn(name="ITEM_ID", referencedColumnName="_ID") 
private Item item; 

@ManyToOne(fetch = FetchType.LAZY) 
@JoinColumn(name="SUPPLIER_ID", referencedColumnName="_ID") 
private Supplier supplier; 

@OneToMany(mappedBy = "product") 
private Collection<Consumption> consumptions; 

我使用的EclipseLink 2.2

當我運行一個項目表上的查詢如下：

public final static String SELECT_ALL_ENTITIES_SQL = "SELECT o FROM Item AS o"; 

public List<Item> getAllEntities() { 
     final EntityManager entityManager = DaoUtils.getEntityManagerFactory().createEntityManager(); 
     final List<Item> items; 
     try { 
      items = (List<Item>) entityManager.createQuery(SELECT_ALL_ENTITIES_SQL).getResultList(); 
     } finally { 
      entityManager.close(); 
     } 

     return items; 
    } 

我得到以下錯誤：

[EL Info]: 2012-10-24 14:16:23.798--ServerSession(1351669994)--EclipseLink, version: Eclipse Persistence Services - 2.2.0.v20110202-r8913 
[EL Severe]: 2012-10-24 14:16:24.16--ServerSession(1351669994)--Local Exception Stack: 
Exception [EclipseLink-0] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.IntegrityException 
Descriptor Exceptions: 
--------------------------------------------------------- 

Exception [EclipseLink-93] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DescriptorException 
Exception Description: The table [item] is not present in this descriptor. 
Descriptor: RelationalDescriptor(database.entities.Product --> [DatabaseTable(product)]) 

Exception [EclipseLink-93] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DescriptorException 
Exception Description: The table [circle] is not present in this descriptor. 
Descriptor: RelationalDescriptor(database.entities.Refund --> [DatabaseTable(refund)]) 

Runtime Exceptions: 
--------------------------------------------------------- 

java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 

java.lang.IndexOutOfBoundsException: Index: 0, Size: 0 

    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:476) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:407) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:680) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:628) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:233) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:394) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:185) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:242) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:230) 
    at database.dao.ItemDao.getAllEntities(ItemDao.java:24) 
    at database.dao.ItemDao.main(ItemDao.java:19) 

Descriptor Exceptions: 
--------------------------------------------------------- 


Local Exception Stack: 
Exception [EclipseLink-93] (Eclipse Persistence Services - 2.2.0.v20110202-r8913): org.eclipse.persistence.exceptions.DescriptorException 
Exception Description: The table [item] is not present in this descriptor. 
Descriptor: RelationalDescriptor(database.entities.Product --> [DatabaseTable(product)]) 
    at org.eclipse.persistence.exceptions.DescriptorException.tableNotPresent(DescriptorException.java:1628) 
    at org.eclipse.persistence.descriptors.ClassDescriptor.getTable(ClassDescriptor.java:2478) 
    at org.eclipse.persistence.descriptors.ClassDescriptor.buildField(ClassDescriptor.java:760) 
    at org.eclipse.persistence.descriptors.ClassDescriptor.buildField(ClassDescriptor.java:749) 
    at org.eclipse.persistence.mappings.OneToManyMapping.initializeTargetForeignKeysToSourceKeys(OneToManyMapping.java:796) 
    at org.eclipse.persistence.mappings.OneToManyMapping.initializeReferenceDescriptor(OneToManyMapping.java:726) 
    at org.eclipse.persistence.mappings.ForeignReferenceMapping.initialize(ForeignReferenceMapping.java:1160) 
    at org.eclipse.persistence.mappings.CollectionMapping.initialize(CollectionMapping.java:1095) 
    at org.eclipse.persistence.mappings.OneToManyMapping.initialize(OneToManyMapping.java:466) 
    at org.eclipse.persistence.descriptors.ClassDescriptor.initialize(ClassDescriptor.java:2744) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:453) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:407) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:680) 
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.loginAndDetectDatasource(DatabaseSessionImpl.java:628) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider.login(EntityManagerFactoryProvider.java:233) 
    at org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl.deploy(EntityManagerSetupImpl.java:394) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.getServerSession(EntityManagerFactoryImpl.java:185) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManagerImpl(EntityManagerFactoryImpl.java:242) 
    at org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl.createEntityManager(EntityManagerFactoryImpl.java:230) 
    at database.dao.ItemDao.getAllEntities(ItemDao.java:24) 
    at database.dao.ItemDao.main(ItemDao.java:19) 

我有什麼錯在這裏做什麼？

更新：在數據庫中，我刪除了產品和項目之間的關係。在我的代碼中，我也刪除了兩個實體之間的任何引用，所以現在數據庫表和實體之間根本沒有任何關係。而我仍然得到同樣的錯誤?????

解決：當我在另一個不相關的實體中編碼我的實體時，我無意中誤解了一個產品的產品。我現在正在桌子上敲着我的頭。

Answer 1

請勿使用@PrimaryKeyJoinColumn。通常情況下，使用JPA Inheritance。使用@JoinColumn annotation

@ManyToOne(fetch = FetchType.LAZY) 
@JoinColumn(name="ITEM_ID", referencedColumnName="ID") 
private Item item; 

這也是Supplier相同。

更新：這是一個EclipseLink的問題。 Bug 282571

嘗試如下修正：

@Entity 
@Table(name="product") 
@SecondaryTable(name="item", pkJoinColumns=@PrimaryKeyJoinColumn(name="_ID")) 
public class Product implements Serializable { 
} 

根據你的錯誤日誌：

Exception Description: The table [circle] is not present in this descriptor. 
Descriptor: RelationalDescriptor(database.entities.Refund --> [DatabaseTable(refund)]) 

您meight需要使用SecondaryTable標註在Refund實體circle。