Hibernate单向父/子关系 – delete（）对子表而不是删除执行更新
如果我从父表中删除记录，我希望删除子表中的相应记录。 如何从Child表中删除Hibernate，而不是尝试使用null更新？
我正在使用Hibernate 3，但目前无法使用注释。 我在下面附上了HBM，DAO等的副本。 – 先感谢您
尝试从父/子关系中的表中删除数据时，我收到以下错误：
Testcase: testDelete(com.dressbarn.imbo.model.data.hibernate.dao.CharityTransferDAOTest): Caused an ERROR Hibernate flushing: Could not execute JDBC batch update; uncategorized SQLException for SQL [update RMS12.DRS_CHARITY_TRANSFER_ITEM set TSF_NO=null, TSF_SEQ_NO=null where TSF_NO=?]; SQL state [72000]; error code [1407]; ORA-01407: cannot update ("RMS12"."DRS_CHARITY_TRANSFER_ITEM"."TSF_NO") to NULL ; nested exception is java.sql.BatchUpdateException: ORA-01407: cannot update ("RMS12"."DRS_CHARITY_TRANSFER_ITEM"."TSF_NO") to NULL org.springframework.jdbc.UncategorizedSQLException: Hibernate flushing: Could not execute JDBC batch update; uncategorized SQLException for SQL [update RMS12.DRS_CHARITY_TRANSFER_ITEM set TSF_NO=null, TSF_SEQ_NO=null where TSF_NO=?]; SQL state [72000]; error code [1407]; ORA-01407: cannot update ("RMS12"."DRS_CHARITY_TRANSFER_ITEM"."TSF_NO") to NULL ; nested exception is java.sql.BatchUpdateException: ORA-01407: cannot update ("RMS12"."DRS_CHARITY_TRANSFER_ITEM"."TSF_NO") to NULL Caused by: java.sql.BatchUpdateException: ORA-01407: cannot update ("RMS12"."DRS_CHARITY_TRANSFER_ITEM"."TSF_NO") to NULL at oracle.jdbc.driver.DatabaseError.throwBatchUpdateException(DatabaseError.java:498) at oracle.jdbc.driver.OraclePreparedStatement.executeBatch(OraclePreparedStatement.java:12368) at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48) at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237) at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:143) at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298) at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27) at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000) at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338) at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106) at org.springframework.orm.hibernate3.HibernateTransactionManager.doCommit(HibernateTransactionManager.java:578) at org.springframework.transaction.support.AbstractPlatformTransactionManager.processCommit(AbstractPlatformTransactionManager.java:662) at org.springframework.transaction.support.AbstractPlatformTransactionManager.commit(AbstractPlatformTransactionManager.java:632) at org.springframework.transaction.interceptor.TransactionAspectSupport.commitTransactionAfterReturning(TransactionAspectSupport.java:314) at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:116) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171) at org.springframework.aop.framework.Cglib2AopProxy$DynamicAdvisedInterceptor.intercept(Cglib2AopProxy.java:629) at com.dressbarn.imbo.model.data.hibernate.dao.CharityTransferDAO$$EnhancerByCGLIB$$6a21cd58.delete() at com.dressbarn.imbo.model.data.hibernate.dao.CharityTransferDAOTest.testDelete(CharityTransferDAOTest.java:112) at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69) 我的表是：
家长 ：
CREATE TABLE DRS_CHARITY_TRANSFER ( TSF_NO NUMBER(10) NOT NULL Primary Key, FROM_LOC NUMBER(10), CHARITY_LOC_ID NUMBER(10), STATUS VARCHAR2(1 CHAR), CREATE_DATE DATE, EXT_REF_NO VARCHAR2(30 CHAR), COMMENT_DESC VARCHAR2(2000 CHAR), USER_ID VARCHAR2(30 CHAR) )
儿童：
CREATE TABLE DRS_CHARITY_TRANSFER_ITEM ( TSF_NO NUMBER(10) NOT NULL PRIMARY KEY, ITEM VARCHAR2(25 BYTE) NOT NULL PRIMARY KEY, TSF_SEQ_NO INTEGER, TSF_QTY INTEGER )
HBM XML
DAO
public class CharityTransferDAO extends HibernateDaoSupport implements ICharityTransfer { public void delete(CharityTransfer charityTransfer) throws IMADataException { try { getSessionFactory() .getCurrentSession() .delete(charityTransfer); } catch (HibernateException e) { throw new IMADataException("failed to delete charity shipping information", e); } }
我一直遇到这个错误。
只需对关系进行反向=“真实”，你的问题就会消失！
基本上反向会告诉hibernate没有父节点就不能存在，从而导致hibernate删除子节点。
话虽如此，您还需要从父级中的集合中删除charityTransfer对象。
（注意：两个用户提出这是一个错误的答案）。
Hibernate文档说你可以将键列标记为not-null="true" ：
来自Hibernate doc on collections ：
如果关联的外键列声明为NOT NULL，则必须声明映射not-null =“true”或使用与标记为inverse =“true”的集合映射的双向关联。 有关详细信息，请参阅本章后面的双向关联讨论。
我还认为你的级联风格中有一个拼写错误（ all-delete-orphan应该是all,delete-orphan ）。