datatable selection returning null

[Richard Pinaroc]

Hello All,

My code is based on the PrimeFaces "DataTable - Row Selection" example. I want to be able to change the color value using selectOneMenu for that selected record. The problem is when add a selectOneMenu

            <h:outputText value="Color:" />  
            <h:selectOneMenu value="#{tableBean.selectedCar.color}"
                             valueChangeListener="#{tableBean.checkColor()}">
                <f:selectItems value="#{solutionReportBackingBean.colorList}" />  
            </h:selectOneMenu>

returns the following error:

javax.el.PropertyNotFoundException: /secure/internal/test.xhtml @79,83 value="#{tableBean.selectedCar.color}": Target Unreachable, 'selectedCar' returned null
	at com.sun.faces.facelets.el.TagValueExpression.getType(TagValueExpression.java:100)
	at com.sun.faces.renderkit.html_basic.HtmlBasicInputRenderer.getConvertedValue(HtmlBasicInputRenderer.java:95)
	at com.sun.faces.renderkit.html_basic.MenuRenderer.convertSelectOneValue(MenuRenderer.java:202)
	at com.sun.faces.renderkit.html_basic.MenuRenderer.getConvertedValue(MenuRenderer.java:319)
	at javax.faces.component.UIInput.getConvertedValue(UIInput.java:1028)
	at javax.faces.component.UIInput.validate(UIInput.java:958)
	at javax.faces.component.UIInput.executeValidate(UIInput.java:1209)
	at javax.faces.component.UIInput.processValidators(UIInput.java:698)
	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1085)
	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1085)
	at javax.faces.component.UIForm.processValidators(UIForm.java:244)
	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1085)
	at javax.faces.component.UIComponentBase.processValidators(UIComponentBase.java:1085)
	at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1165)
	at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
	at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:508)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:304)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.autonomy.automater.filters.PageAccessFilter.doFilter(PageAccessFilter.java:57)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.autonomy.automater.filters.EmployeeAccessFilter.doFilter(EmployeeAccessFilter.java:62)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.autonomy.automater.filters.AccessFilter.doFilter(AccessFilter.java:58)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at com.autonomy.automater.filters.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:105)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:240)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:164)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:498)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:562)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:394)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:243)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:188)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:302)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

[Tim Holloway]

All that says is the "getSelectedCar()" method on tableBean returned a null value. Or, there is no public void getSelectedCar() property accessor method on tableBean.