引起：javax.persistence.PersistenceException：插入对象

Question

SRAssignment.java

@Entity
@Table(name="SR_ASSIGNEMENT", uniqueConstraints= { @UniqueConstraint
(columnNames="SRAID")})
@SequenceGenerator(name="SRASSIGNMENT_SEQUENCE", initialValue=1, allocationSize=1)
public class SRAssignment implements Serializable{

@Id @GeneratedValue(strategy=GenerationType.SEQUENCE, 
generator="SRASSIGNMENT_SEQUENCE")
@Column(name="SRAID", nullable=false)
private long sraId;

@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="EMPNO")
private Employee employee;

@OneToOne(fetch=FetchType.EAGER, mappedBy="srNo", optional=false)
private ServiceRequest serviceRequest;

@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="assignedBy")
private Employee assignedBy;

@Column(name="ASSIGNEDON")
@Temporal(TemporalType.TIMESTAMP) 
private Date assignedOn;

@OneToOne(fetch=FetchType.LAZY, optional=true, mappedBy="slotNo")
private ScheduleSlot startSlot;

@OneToOne(fetch=FetchType.LAZY , optional=true, mappedBy="slotNo")
private ScheduleSlot expectedEndSlot;

@OneToOne(fetch=FetchType.LAZY , optional=true, mappedBy="slotNo")
private ScheduleSlot actualEndSlot;

@Column(name="SRA_COMMENT", nullable=true)
private String comment;

@Column(name="ATTACHMENT", nullable=true)
private Object attachment;

....

ServiceRequest.java

@Entity
@Table(name="SERVICE_REQUEST", uniqueConstraints = {@UniqueConstraint(columnNames=     
{"SRNO"})})
@SequenceGenerator(name="SERVICE_REQUEST_SEQUENCE", initialValue=1, allocationSize=100)
public class ServiceRequest implements Serializable {

@Id @GeneratedValue(strategy=GenerationType.SEQUENCE, 
generator="SERVICE_REQUEST_SEQUENCE")
@Column(name="SRNO",  nullable=false)
private long srNo;

@Column(name="DESCRIPTION")
private String description;

@Column(name="STATUS") 
private int status;


@ManyToOne(fetch=FetchType.LAZY)
@JoinColumn(name="CUSTNO", referencedColumnName="CustNO")
private Customer customer;

@Column(name="DATECREATED")
private Date dateCreated;

@Column(name="DATEUPDATED")
private Date dateUpdated;
...


ServiceRequest request = workPersistence.getRequestById(assigner.getRequestId());
Employee employee = workPersistence.getEmployeeById(assigner.getTechnician());
Employee manager = workPersistence.getEmployeeById(assigner.getAssignedBy());
SRAssignment assignment = new SRAssignment();

assignment.setEmployee(employee);
assignment.setAssignedBy(manager);
assignment.setServiceRequest(request);
assignment.setAssignedOn(Calendar.getInstance().getTime());

EntityManager em = entityManagerFactory.createEntityManager();
EntityTransaction tx = em.getTransaction();
tx.begin();
em.persist(assignment);
em.refresh(assignment);
System.out.println("refresh assignment, now commiting...");
tx.commit();

我得到的错误是：

刷新作业，现在提交...... javax.persistence.RollbackException：事务未能提交         在org.datanucleus.api.jpa.JPAEntityTransaction.commit（JPAEntityTransaction.java:118）         在com.ge.dsp.iwork.persistence.JpaWorkPersistence.assignRequest（JpaWorkPersistence.java:417）         在com.ge.dsp.iwork.impl.WorkServiceImpl.getRequestAssigned（WorkServiceImpl.java:146）         在com.ge.dsp.iwork.impl.WorkServiceImpl.assignRequest（WorkServiceImpl.java:112）         在com.ge.dsp.iwork.test.WorkServiceTest.testServiceRequestAssignment（WorkServiceTest.java:85）         at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）         at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）         at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）         在java.lang.reflect.Method.invoke（Method.java:597）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod（AbstractAutowireCapableBeanFactory.java:1581）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1522）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1452）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:519）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）         在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:294）         在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:225）         在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:291）         在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）         at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:609）         在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:918）         在org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access $ 1600（AbstractDelegatedExecutionApplicationContext.java:69）         at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext $ 4.run（AbstractDelegatedExecutionApplicationContext.java:355）         在org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL（PrivilegedUtils.java:85）         在org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh（AbstractDelegatedExecutionApplicationContext.java:320）         在org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor $ CompleteRefreshTask.run（DependencyWaiterApplicationContextExecutor.java:132）         在java.lang.Thread.run（Thread.java:662） 引起：javax.persistence.PersistenceException：插入对象＆＃34; com.ge.dsp.iwork.entity.SRAssignment@7edab86b"使用语句＆＃34; INSERT INTO SR_ASSIGNEMENT（ASSIGNEDBY，SRA_COMMENT，EMPNO，ASSIGNEDON，SRAID）VALUES（？，？，？，？，？）＆＃34;失败 ：ORA-01400：无法插入NULL（＆＃34; DSP_QA_4＆＃34;。＆＃34; SR_ASSIGNEMENT＆＃34;。＆＃34; SRNO＆＃34;）

    at org.datanucleus.api.jpa.NucleusJPAHelper.getJPAExceptionForNucleusException(NucleusJPAHelper.java:270)
    at org.datanucleus.api.jpa.JPAEntityTransaction.commit(JPAEntityTransaction.java:116)
    ... 25 more

引起：java.sql.SQLIntegrityConstraintViolationException：ORA-01400：无法将NULL插入（＆＃34; DSP_QA_4＆＃34;。＆＃34; SR_ASSIGNEMENT＆＃34;。＆＃34; SRNO＆＃34;）

    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:439)
    at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:395)
    at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:802)
    at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:436)
    at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:186)
    at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:521)
    at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:205)
    at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1008)
    at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1307)
    at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3449)
    at oracle.jdbc.driver.OraclePreparedStatement.executeUpdate(OraclePreparedStatement.java:3530)
    at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeUpdate(OraclePreparedStatementWrapper.java:1350)
    at org.datanucleus.store.rdbms.datasource.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
    at org.datanucleus.store.rdbms.datasource.dbcp.DelegatingPreparedStatement.executeUpdate(DelegatingPreparedStatement.java:105)
    at org.datanucleus.store.rdbms.SQLController.executeStatementUpdate(SQLController.java:419)
    at org.datanucleus.store.rdbms.request.InsertRequest.execute(InsertRequest.java:411)
    at org.datanucleus.store.rdbms.RDBMSPersistenceHandler.insertTable(RDBMSPersistenceHandler.java:166)
    at org.datanucleus.store.rdbms.RDBMSPersistenceHandler.insertObject(RDBMSPersistenceHandler.java:142)
    at org.datanucleus.state.JDOStateManager.internalMakePersistent(JDOStateManager.java:2377)
    at org.datanucleus.state.JDOStateManager.flush(JDOStateManager.java:3769)
    at org.datanucleus.ObjectManagerImpl.flushInternalWithOrdering(ObjectManagerImpl.java:3884)
    at org.datanucleus.ObjectManagerImpl.flushInternal(ObjectManagerImpl.java:3807)
    at org.datanucleus.ObjectManagerImpl.flush(ObjectManagerImpl.java:3747)
    at org.datanucleus.ObjectManagerImpl.preCommit(ObjectManagerImpl.java:4137)
    at org.datanucleus.ObjectManagerImpl.transactionPreCommit(ObjectManagerImpl.java:428)
    at org.datanucleus.TransactionImpl.internalPreCommit(TransactionImpl.java:400)
    at org.datanucleus.TransactionImpl.commit(TransactionImpl.java:288)
    at org.datanucleus.api.jpa.JPAEntityTransaction.commit(JPAEntityTransaction.java:103)
    ... 25 more

为什么它没有获取serviceRequest信息，并且没有在作业中插入SRNO？ 当我尝试跟随时也处于相同的关系：

EntityManager em = entityManagerFactory.createEntityManager();
Query query = em
.createQuery(
"SELECT assignment FROM SRAssignment assignment WHERE assignment.sraId = :sraId")
            .setParameter("sraId", new Long(assignmentId));
List<SRAssignment> assignments = query.getResultList();
SRAssignment sra = (SRAssignment) assignments.get(0);
    System.out.println(sra.getSraId());
    System.out.println(sra.getEmployee().getEmpNo());
    System.out.println("________________________________________");
    System.out.println(sra.getServiceRequest().getSrNo());
    System.out.println();
    em.close();

一旦我上线         的的System.out.println（sra.getServiceRequest（）getSrNo（））;

我收到错误：     的 _ __ _ __ _ __ _ __ _ __ _ __ _ ___ 线程中的异常＆＃34; SpringOsgiExtenderThread-88＆＃34; org.springframework.beans.factory.BeanCreationException：创建名称为＆＃39; testGetAssignmentById＆＃39;的bean时出错在URL [bundle：//178.33：0 / META-INF / spring / module-context.xml]中定义：Inv init方法的ocation失败;嵌套异常是javax.persistence.PersistenceException：无法执行操作＆＃34; ==＆＃34;在org.datanucleus.store.rdbms.sql.expression.ObjectExpression@843249a和org.datanucleus.store.rdbms.sql.express上 ion.NumericExpression@7017feb2         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1455）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean（AbstractAutowireCapableBeanFactory.java:519）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean（AbstractAutowireCapableBeanFactory.java:456）         在org.springframework.beans.factory.support.AbstractBeanFactory $ 1.getObject（AbstractBeanFactory.java:294）         在org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton（DefaultSingletonBeanRegistry.java:225）         在org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean（AbstractBeanFactory.java:291）         在org.springframework.beans.factory.support.AbstractBeanFactory.getBean（AbstractBeanFactory.java:193）         at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons（DefaultListableBeanFactory.java:609）         在org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization（AbstractApplicationContext.java:918）         在org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.access $ 1600（AbstractDelegatedExecutionApplicationContext.java:69）         at org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext $ 4.run（AbstractDelegatedExecutionApplicationContext.java:355）         在org.springframework.osgi.util.internal.PrivilegedUtils.executeWithCustomTCCL（PrivilegedUtils.java:85）         在org.springframework.osgi.context.support.AbstractDelegatedExecutionApplicationContext.completeRefresh（AbstractDelegatedExecutionApplicationContext.java:320）         在org.springframework.osgi.extender.internal.dependencies.startup.DependencyWaiterApplicationContextExecutor $ CompleteRefreshTask.run（DependencyWaiterApplicationContextExecutor.java:132）         在java.lang.Thread.run（Thread.java:662） 引起：javax.persistence.PersistenceException：无法执行操作＆＃34; ==＆＃34;在org.datanucleus.store.rdbms.sql.expression.ObjectExpression@843249a和org.datanucleus.store.rdbms.sql.expression.NumericExpression@7017feb2         at org.datanucleus.api.jpa.NucleusJPAHelper.getJPAExceptionForNucleusException（NucleusJPAHelper.java:302）         at org.datanucleus.api.jpa.JPAAdapter.getApiExceptionForNucleusException（JPAAdapter.java:898）         at org.datanucleus.state.JDOStateManager.isLoaded（JDOStateManager.java:1736）         在com.ge.dsp.iwork.entity.SRAssignment.jdoGetserviceRequest（SRAssignment.java）         在com.ge.dsp.iwork.entity.SRAssignment.getServiceRequest（SRAssignment.java:151）         在com.ge.dsp.iwork.persistence.JpaWorkPersistence.getAssignmentsByAssignmentId（JpaWorkPersistence.java:462）         在com.ge.dsp.iwork.test.WorkServiceTest.testGetAssignmentById（WorkServiceTest.java:59）         at sun.reflect.NativeMethodAccessorImpl.invoke0（Native Method）         at sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:39）         at sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:25）         在java.lang.reflect.Method.invoke（Method.java:597）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeCustomInitMethod（AbstractAutowireCapableBeanFactory.java:1581）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods（AbstractAutowireCapableBeanFactory.java:1522）         在org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean（AbstractAutowireCapableBeanFactory.java:1452）         ......还有14个 引起：org.datanucleus.store.rdbms.sql.expression.IllegalExpressionOperationException：无法执行操作＆＃34; ==＆＃34;在org.datanucleus.store.rdbms.sql.expression.ObjectExpression@843249a和org.datanucleus.store.rdbms.sql.express上 ion.NumericExpression@7017feb2         在org.datanucleus.store.rdbms.sql.expression.SQLExpression.eq（SQLExpression.java:383）         at org.datanucleus.store.rdbms.sql.expression.ObjectExpression.eq（ObjectExpression.java:217）         在org.datanucleus.store.rdbms.sql.SQLStatement.getJoinConditionForJoin（SQLStatement.java:1232）         在org.datanucleus.store.rdbms.sql.SQLStatement.join（SQLStatement.java:1151）         在org.datanucleus.store.rdbms.sql.SQLStatement.leftOuterJoin（SQLStatement.java:892）         在org.datanucleus.store.rdbms.sql.SQLStatement.leftOuterJoin（SQLStatement.java:848）         在org.datanucleus.store.rdbms.sql.SQLStatementHelper.addJoinForOneToOneRelation（SQLStatementHelper.java:995）         at org.datanucleus.store.rdbms.sql.SQLStatementHelper.selectMemberOfSourceInStatement（SQLStatementHelper.java:839）         在org.datanucleus.store.rdbms.request.FetchRequest.processMembersOfClass（FetchRequest.java:488）         在org.datanucleus.store.rdbms.request.FetchRequest。（FetchRequest.java:166）         在org.datanucleus.store.rdbms.RDBMSPersistenceHandler.getFetchRequest（RDBMSPersistenceHandler.java:339）         在org.datanucleus.store.rdbms.RDBMSPersistenceHandler.fetchObject（RDBMSPersistenceHandler.java:316）         at org.datanucleus.state.JDOStateManager.loadFieldsFromDatastore（JDOStateManager.java:1634）         at org.datanucleus.state.JDOStateManager.loadSpecifiedFields（JDOStateManager.java:1236）         在org.datanucleus.state.JDOStateManager.isLoaded（JDOStateManager.java:1724）         ......还有25个

Answer 1

好的，我现在明白了...... JPA规范不允许在目标表中使用外键的单向OneToOne。它需要在两个方向上定义OneToOne。 所以我在serviceRequest中定义了onetoone以使用myppedBy ... 我将SRAssignment修改为：

@OneToOne(fetch=FetchType.LAZY )
@JoinColumn(name="SRNO", nullable=false)
private ServiceRequest serviceRequest;

和ServiceRequest as：

@OneToOne (fetch=FetchType.LAZY, optional=true,  mappedBy="serviceRequest")
private SRAssignment assignment;

由于