Мне нужно создать составной первичный ключ, который будет иметь один класс ComponentMarks внешнего ключа:
@IdClass(SubQuesCompIDs.class)
@Entity
@Table(name="component_marks")
public class ComponentMarks {
@Id
private String component_ID;
@Id
private String question_ID;
@Id
@ManyToOne(targetEntity=ConsolidatedMarks.class)
@JoinColumn(name="submission_unique_ID", referencedColumnName="submission_unique_ID")
private ConsolidatedMarks consolidatedMarks;
//***********getters and setters***********
}
Класс SubQuesCompIDs:
public class SubQuesCompIDs implements Serializable{
private ConsolidatedMarks consolidatedMarks;
private String component_ID;
private String question_ID;
/****************getters and setter************/
}
Класс ConsolidatedMarks:
public class ConsolidatedMarks {
@Id
private String submission_unique_ID;
/****************getters and setter************/
}
ошибка:
Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [RDEVAL_MySQL_DB] failed.
Internal Exception: Exception [TOPLINK-7150] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException
Exception Description: Invalid composite primary key specification. The names of the primary key fields or properties in the primary key class [com.eta.entityBeans.SubQuesCompIDs] and those of the entity bean class [class com.eta.entityBeans.ComponentMarks] must correspond and their types must be the same. Also, ensure that you have specified id elements for the corresponding attributes in XML and/or an @Id on the corresponding fields or properties of the entity class.
java.lang.Exception:
Exception Description: An exception was thrown while searching for persistence archives with ClassLoader: WebappClassLoader
context: /ProjectName **
delegate: false
----------> Parent Classloader:
java.net.URLClassLoader@26b418
Internal Exception: javax.persistence.PersistenceException: Exception [TOPLINK-28018] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.EntityManagerSetupException
Exception Description: predeploy for PersistenceUnit [RDEVAL_MySQL_DB] failed.
Internal Exception: Exception [TOPLINK-7150] (Oracle TopLink Essentials - 2.0.1 (Build b09d-fcs (12/06/2007))): oracle.toplink.essentials.exceptions.ValidationException
Exception Description: Invalid composite primary key specification. The names of the primary key fields or properties in the primary key class [com.eta.entityBeans.SubQuesCompIDs] and those of the entity bean class [class com.eta.entityBeans.ComponentMarks] must correspond and their types must be the same. Also, ensure that you have specified id elements for the corresponding attributes in XML and/or an @Id on the corresponding fields or properties of the entity class.
а также в классе Java «ComponentMarks» в «@IdClass (SubQuesCompIDs.class)» отображалось это сообщение об ошибке компиляции:
The attribute matching the ID class attribute consolidatedMarks does not have the correct type com.eta.entityBeans.ConsolidatedMarks
ConsolidatedMarks находится в пакете com.eta.entityBeans.
Обновить маркеры компонентов:
@Entity
@Table(name="component_marks")
@IdClass(SubQuesCompIDs.class)
public class ComponentMarks {
@Id
private String component_ID;
@Id
private String question_ID;
@Id
@Column(name="submission_unique_ID")
@ManyToOne(cascade=CascadeType.ALL)
@JoinColumn(name="submission_unique_ID")
private ConsolidatedMarks consolidatedMarks;
/****************getters and setter************/
}
обновленные SubQuesCompID:
public class SubQuesCompIDs implements Serializable{
private String consolidatedMarks;
private String component_ID;
private String question_ID;
/****************getters and setter************/
}
теперь вторая ошибка, которая является ошибкой компиляции, не появляется.