[jboss-user] [JBoss Seam] - Recommended way of using Select boxes - The Seam Way

I am attempting to load a SelectOneMenu with a list of entities. I then want to use the selection in a query to get another entity. Seems like a simple use case so far. Should I be using the entity from SelectOneMany or just its id field to filter the query? I am getting a bunch of weird TransientObjectExceptions when my page loads/reloads. Here is an example of what I am doing I have a SelectOneMenu with a list of LandmarkType entities (filled from entity-query "allLandmarkTypes") that have a one to many relationship with Landmark entity. I wish to fill a list of Landmarks based on my LandmarkType selection <h:outputLabel id="landmarkType_label" for="landmarkType_id" | value="#{messages['AddressLookup.landmarkType']}"/> | <a4j:region selfRendered="true"> | <h:selectOneMenu id="landmarkType_id" | value="#{landmarkType}"> | <s:selectItems label="#{landType.landmarkTypeDescription}" | value="#{allLandmarkTypes.resultList}" | noSelectionLabel="(None)" var="landType"/> | <s:convertEntity/> | <a4j:support event="onchange" | actionListener="#{addressLocator.fillLandmarkList}" | ajaxSingle="true" reRender="landmark_input"/> | </h:selectOneMenu> | </a4j:region> | <h:outputLabel id="landmark_label" for="landmark_id" | value="#{messages['AddressLookup.landmark']}"/> | <h:selectOneMenu id="landmark_input" value="#{landmark}"> | <s:selectItems label="#{land.landmarkName}" | value="#{landmarkList}" | noSelectionLabel="(None)" var="land"/> | <s:convertEntity/> | </h:selectOneMenu> | @Stateful | @Name("addressLocator") | public class AddressLocatorAction implements AddressLocator { | | @In(required=false) | private LandmarkType landmarkType; | | @Out(required=false) | List<Landmark> landmarkList; | | @Factory("landmarkList") | public void fillLandmarkList() { | | landmarkList = entityManager.createQuery("SELECT l from Landmark l WHERE l.landmarkType = :landmarkType" + | " OR :landmarkType IS NULL ORDER BY l.landmarkName").setParameter("landmarkType",landmarkType).getResultList(); | | } | .... | So my question is, should I be dealing with the LandmarkType entity directly or should I just use its Id to filter the Landmark List. I am concerned about the state of the LandmarkType entity. What is the recommended way of dealing with this seemingly simple use case? When I load the page I get the following error. SEVERE: Error Rendering View[/addresslookup.xhtml] | javax.ejb.EJBTransactionRolledbackException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.stlouiscity.csb.ejb.model.LandmarkType | at org.jboss.ejb3.tx.Ejb3TxPolicy.handleInCallerTx(Ejb3TxPolicy.java:87) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:130) | at org.jboss.aspects.tx.TxInterceptor$Required.invoke(TxInterceptor.java:195) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.tx.TxPropagationInterceptor.invoke(TxPropagationInterceptor.java:76) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateful.StatefulInstanceInterceptor.invoke(StatefulInstanceInterceptor.java:83) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.security.AuthenticationInterceptor.invoke(AuthenticationInterceptor.java:77) | at org.jboss.ejb3.security.Ejb3AuthenticationInterceptor.invoke(Ejb3AuthenticationInterceptor.java:106) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.ENCPropagationInterceptor.invoke(ENCPropagationInterceptor.java:46) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.asynchronous.AsynchronousInterceptor.invoke(AsynchronousInterceptor.java:106) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.stateful.StatefulContainer.localInvoke(StatefulContainer.java:204) | at org.jboss.ejb3.stateful.StatefulLocalProxy.invoke(StatefulLocalProxy.java:100) | at $Proxy174.fillLandmarkList(Unknown Source) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) | at org.jboss.seam.intercept.RootInvocationContext.proceed(RootInvocationContext.java:31) | at org.jboss.seam.intercept.ClientSideInterceptor$1.proceed(ClientSideInterceptor.java:72) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57) | at org.jboss.seam.interceptors.RemoveInterceptor.aroundInvoke(RemoveInterceptor.java:40) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103) | at org.jboss.seam.intercept.ClientSideInterceptor.invoke(ClientSideInterceptor.java:50) | at org.javassist.tmp.java.lang.Object_$$_javassist_91.fillLandmarkList(Object_$$_javassist_91.java) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.seam.util.Reflections.invoke(Reflections.java:21) | at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:124) | at org.jboss.seam.Component.callComponentMethod(Component.java:1904) | at org.jboss.seam.Component.getInstanceFromFactory(Component.java:1766) | at org.jboss.seam.Component.getInstance(Component.java:1703) | at org.jboss.seam.Component.getInstance(Component.java:1680) | at org.jboss.seam.Component.getInstance(Component.java:1674) | at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:57) | at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53) | at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:64) | at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44) | at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186) | at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71) | at javax.faces.component.UISelectItems.getValue(UISelectItems.java:130) | at org.jboss.seam.ui.UISelectItems.getValue(UISelectItems.java:170) | at com.sun.faces.renderkit.RenderKitUtils.getSelectItems(RenderKitUtils.java:323) | at com.sun.faces.renderkit.html_basic.MenuRenderer.getOptionNumber(MenuRenderer.java:675) | at com.sun.faces.renderkit.html_basic.MenuRenderer.renderSelect(MenuRenderer.java:793) | at com.sun.faces.renderkit.html_basic.MenuRenderer.encodeEnd(MenuRenderer.java:335) | at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:833) | at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:279) | at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:242) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809) | at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282) | at org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262) | at org.richfaces.renderkit.TabRendererBase.encodeChildren(TabRendererBase.java:113) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809) | at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282) | at org.ajax4jsf.framework.renderer.RendererBase.renderChildren(RendererBase.java:262) | at org.richfaces.renderkit.html.TabPanelRenderer.doEncodeChildren(TabPanelRenderer.java:272) | at org.richfaces.renderkit.html.TabPanelRenderer.doEncodeChildren(TabPanelRenderer.java:267) | at org.ajax4jsf.framework.renderer.RendererBase.encodeChildren(RendererBase.java:121) | at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:809) | at org.ajax4jsf.framework.renderer.RendererBase.renderChild(RendererBase.java:282) | at org.ajax4jsf.framework.renderer.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:159) | at org.ajax4jsf.framework.renderer.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:97) | at org.ajax4jsf.framework.renderer.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:150) | at org.ajax4jsf.framework.renderer.AjaxChildrenRenderer.encodeAjaxChildren(AjaxChildrenRenderer.java:97) | at org.ajax4jsf.framework.renderer.AjaxChildrenRenderer.encodeAjaxComponent(AjaxChildrenRenderer.java:150) | at org.ajax4jsf.framework.renderer.AjaxContainerRenderer.encodeAjax(AjaxContainerRenderer.java:125) | at org.ajax4jsf.framework.ajax.AjaxViewRoot.encodeAjax(AjaxViewRoot.java:549) | at org.ajax4jsf.framework.ajax.AjaxViewRoot$4.invokeRoot(AjaxViewRoot.java:380) | at org.ajax4jsf.framework.ajax.JsfOneOneInvoker.invokeOnRegionOrRoot(JsfOneOneInvoker.java:53) | at org.ajax4jsf.framework.ajax.AjaxContext.invokeOnRegionOrRoot(AjaxContext.java:191) | at org.ajax4jsf.framework.ajax.AjaxViewRoot.encodeChildren(AjaxViewRoot.java:397) | at javax.faces.component.UIComponent.encodeAll(UIComponent.java:886) | at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:571) | at org.ajax4jsf.framework.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108) | at org.ajax4jsf.framework.ajax.AjaxViewHandler.renderView(AjaxViewHandler.java:233) | at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:106) | at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:251) | at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:144) | at javax.faces.webapp.FacesServlet.service(FacesServlet.java:245) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:70) | at org.jboss.seam.debug.hot.HotDeployFilter.doFilter(HotDeployFilter.java:64) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | at org.jboss.seam.web.ExceptionF | 2007-07-16 16:36:44,743 ERROR [STDERR] ilter.doFilter(ExceptionFilter.java:60) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:81) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:47) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:127) | at org.ajax4jsf.framework.ajax.xmlfilter.BaseFilter.doFilter(BaseFilter.java:277) | at org.jboss.seam.web.AbstractAjax4jsfFilter.doFilter(AbstractAjax4jsfFilter.java:35) | at org.jboss.seam.web.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:56) | at org.jboss.seam.web.SeamFilter.doFilter(SeamFilter.java:127) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) | at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) | at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) | at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) | at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) | at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:179) | at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) | at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) | at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) | at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104) | at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:156) | at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) | at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:241) | at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) | at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:580) | at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) | at java.lang.Thread.run(Thread.java:595) | Caused by: java.lang.IllegalStateException: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.stlouiscity.csb.ejb.model.LandmarkType | at org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:626) | at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:73) | at com.stlouiscity.csb.ejb.action.AddressLocatorAction.fillLandmarkList(AddressLocatorAction.java:212) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:112) | at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:166) | at org.jboss.seam.intercept.EJBInvocationContext.proceed(EJBInvocationContext.java:37) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:57) | at org.jboss.seam.interceptors.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:47) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.ManagedEntityIdentityInterceptor.aroundInvoke(ManagedEntityIdentityInterceptor.java:37) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.BusinessProcessInterceptor.aroundInvoke(BusinessProcessInterceptor.java:50) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.interceptors.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:27) | at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:69) | at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:103) | at org.jboss.seam.intercept.SessionBeanInterceptor.aroundInvoke(SessionBeanInterceptor.java:53) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:585) | at org.jboss.ejb3.interceptor.InvocationContextImpl.proceed(InvocationContextImpl.java:118) | at org.jboss.ejb3.interceptor.EJB3InterceptorsInterceptor.invoke(EJB3InterceptorsInterceptor.java:63) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.entity.ExtendedPersistenceContextPropagationInterceptor.invoke(ExtendedPersistenceContextPropagationInterceptor.java:57) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.entity.TransactionScopedEntityManagerInterceptor.invoke(TransactionScopedEntityManagerInterceptor.java:54) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.ejb3.AllowedOperationsInterceptor.invoke(AllowedOperationsInterceptor.java:47) | at org.jboss.aop.joinpoint.MethodInvocation.invokeNext(MethodInvocation.java:101) | at org.jboss.aspects.tx.TxPolicy.invokeInCallerTx(TxPolicy.java:126) | ... 121 more | Caused by: org.hibernate.TransientObjectException: object references an unsaved transient instance - save the transient instance before flushing: com.stlouiscity.csb.ejb.model.LandmarkType | at org.hibernate.engine.ForeignKeys.getEntityIdentifierIfNotUnsaved(ForeignKeys.java:219) | at org.hibernate.type.EntityType.getIdentifier(EntityType.java:397) | at org.hibernate.type.ManyToOneType.nullSafeSet(ManyToOneType.java:87) | at org.hibernate.param.NamedParameterSpecification.bind(NamedParameterSpecification.java:38) | at org.hibernate.loader.hql.QueryLoader.bindParameterValues(QueryLoader.java:491) | at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1563) | at org.hibernate.loader.Loader.doQuery(Loader.java:673) | at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236) | at org.hibernate.loader.Loader.doList(Loader.java:2220) | at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2104) | at org.hibernate.loader.Loader.list(Loader.java:2099) | at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:378) | at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:338) | at org.hibernate.engine.query.HQLQueryPlan.performList(HQLQueryPlan.java:172) | at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1121) | at org.hibernate.impl.QueryImpl.list(QueryImpl.java:79) | at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:64) | 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