父子关系及inverse 详解

为什么谈得是inverse=true，但是从头到尾都没有在代码里出现，只说不写会怎么样，反而贴上了代码。
这是我第二次读，一时冲动把自己的所有在one-to-many里的inverse=true删掉了，改在many-to-one里。

现在是两个小时以后，我把他们又改回来了，原来我以前看reference的时候的理解是正确的。

我看让人误解的文章不是什么好文章。

inverse="true"就相当于是RDBMS当中的PK-->FK的关系,本来PK不用关心FK的指向就是了,inverse="true"就是反映了这种关系.

只设置了一个父亲，没有保存儿子，
在查询时,
Query qry = session.createQuery( "from Service as obj");
List list =qry.list();
报HIBERNATE异常

net.sf.hibernate.PropertyAccessException: exception setting property value with CGLIB (set hibernate.cglib.use_reflection_optimizer=false for more info) setter of com.oss.entity.OneOffService.setScplans

at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:216)

at net.sf.hibernate.impl.SessionImpl.initializeEntity(SessionImpl.java:2137)

at net.sf.hibernate.loader.Loader.doQuery(Loader.java:239)

at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:132)

at net.sf.hibernate.loader.Loader.doList(Loader.java:949)

at net.sf.hibernate.loader.Loader.list(Loader.java:940)

at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:833)

at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1475)

at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:39)

at com.oss.action.ServiceAction.performList(ServiceAction.java:128)

at com.oss.action.ServiceAction.executeAction(ServiceAction.java:73)

at com.oss.action.BaseAction.execute(BaseAction.java:66)

at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)

at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)

at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)

at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)

at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:256)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2416)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:171)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:172)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)

at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)

at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)

at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)

at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)

at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:601)

at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:392)

at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:565)

at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:619)

at java.lang.Thread.run(Thread.java:534)

Caused by: net.sf.cglib.beans.BulkBeanException

at com.oss.entity.OneOffService$$BulkBeanByCGLIB$$77e38f5e.setPropertyValues(<generated>)

at net.sf.hibernate.persister.AbstractEntityPersister.setPropertyValues(AbstractEntityPersister.java:211)

... 46 more

已经解决了！！配置问题

才学这个东东，对我很有帮助的

很不错，我一直想弄明白inverse到底起什么作用呢，这回知道了。

谢谢楼主～～

学习中……

请问，如果删除Parent，Child会被对应删除吗？～

这时inverse设置有什么影响么？～

谢谢！

好文章，只是楼主有些地主说有不太明白！

如果把三种情况的配置文件，运行文件，和运行结果分别讨论就太好啦

在父子关系中，如果存在赃数据，楼主怎么解决的呢？
还是说压根就不考虑赃数据的问题的？