Hey Guy, You inspired me to write a blog on the dataTable which I have been meaning to do for a while. Hope it helps:
http://andrewfacelets.blogspot.com/2008/06/understanding-datatable.html -Andrew On Sat, Jun 7, 2008 at 2:07 PM, Volker Weber <[EMAIL PROTECTED]> wrote: > Hi Guy, > > seems like you also don't know how UIData works. I can't believe you > getComponents ever return more than one component in the list? > > > guessing the htmlDataTableDayParts is the UIData, try this: > > > private boolean validateDayParts() > { > boolean isOk = true; > HtmlSelectOneMenu htmlSelectOneMenuFrom = > htmlDataTableDayParts.findComponent(''hourFrom"); > HtmlSelectOneMenu htmlSelectOneMenuTo = > htmlDataTableDayParts.findComponent(''hourTo"); > > for (int i = 0; i < htmlDataTableDayParts.getRowCount(); i++) { > htmlDataTableDayParts.setRowIndex(i); > if (htmlSelectOneMenuFrom.getValue().equals(-1) || > htmlSelectOneMenuTo.getValue().equals(-1)) > { > isOk = false; > htmlSelectOneMenuFrom.setValid(false); > > FacesUtil.addErrorMessage(htmlSelectOneMenuFrom.getClientId(FacesUtil.getFacesContext()), > "#{bundle['cmp_targeting.time.fromTo.required']}"); > } > > } > htmlDataTableDayParts.setRowIndex(-1); // this is important > return isOk; > } > > > But i still dont understand why you need this having the values in the model. > > > Regards, > Volker > > > > 2008/6/7 Guy Bashan <[EMAIL PROTECTED]>: >> Hi Volker, >> >> Here are both methods I am using: >> private List<UIComponent> getComponents(UIComponent rootComponent, String >> id) >> { >> List<UIComponent> components = rootComponent.getChildren(); >> List<UIComponent> result = new ArrayList<UIComponent>(); >> for (UIComponent component : components) >> { >> if (component.getId().equals(id)) >> { >> result.add(component); >> } >> >> result.addAll(getComponents(component, id)); >> } >> >> return result; >> } >> >> private boolean validateDayParts() >> { >> List<UIComponent> hoursFrom = getComponents(htmlDataTableDayParts, >> "hourFrom"); >> List<UIComponent> hoursTo = getComponents(htmlDataTableDayParts, >> "hourTo"); >> >> boolean isOk = true; >> for (int i = 0; i < hoursFrom.size(); i++) >> { >> HtmlSelectOneMenu htmlSelectOneMenuFrom = >> (HtmlSelectOneMenu)hoursFrom.get(i); >> HtmlSelectOneMenu htmlSelectOneMenuTo = >> (HtmlSelectOneMenu)hoursTo.get(i); >> >> if (htmlSelectOneMenuFrom.getValue().equals(-1) || >> htmlSelectOneMenuTo.getValue().equals(-1)) >> { >> isOk = false; >> htmlSelectOneMenuFrom.setValid(false); >> >> FacesUtil.addErrorMessage(htmlSelectOneMenuFrom.getClientId(FacesUtil.getFacesContext()), >> "#{bundle['cmp_targeting.time.fromTo.required']}"); >> } >> } >> >> return isOk; >> } >> >> I call the method "validateDayParts" from a saveAction method that is >> activated when pressing a command link. >> >> Thanks, >> Guy. >> >> >> -----Original Message----- >> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Volker Weber >> Sent: Saturday, June 07, 2008 9:41 PM >> To: MyFaces Discussion >> Subject: Re: Datatable binding problem >> >> Hi Guy, >> >> could you post your loop code? >> >> >> Regards, >> Volker >> >> >> >> 2008/6/7 Guy Bashan <[EMAIL PROTECTED]>: >>> Hi again, >>> >>> >>> >>> In order to validate set of dropdowns in a datatable, I wrote a method to >>> extract all components with a specific id (under that datatable), then scan >>> the returned values in a loop an and make sure values are properly set. >>> >>> The method is activated in the save action. >>> >>> It seems like the drop down component properties: "value" and >>> "submittedValue" are null. >>> >>> (The data is passed to the bean objects properly and saved to database, but >>> when getting it directly from the component it returns a null value). >>> >>> >>> >>> Am I missing something? >>> >>> >>> >>> Thanks, >>> >>> Guy. >>> >>> >>> >>> >>> >>> From: Andrew Robinson [mailto:[EMAIL PROTECTED] >>> Sent: Saturday, June 07, 2008 4:50 PM >>> To: MyFaces Discussion >>> Subject: Re: Datatable binding problem >>> >>> >>> >>> You are not understanding how JSF databinding works. I'll give you a brief >>> overview, but I would strongly recommend that you stop development and read >>> some articles on control binding before continuing. >>> >>> >>> >>> The binding happens at component construction time, not render time. If this >>> does not click, then read my blog at http://andrewfacelets.blogspot.com. >>> >>> >>> >>> In your case, the binding happens when the component tree is built. Which >>> means that the data table has no data, no var that is set, etc. A data table >>> has only one set of components that are re-rendered for each value. There >>> are not new components for each value. Think of it as a swing tree that has >>> a node rendered that is called to render every node - there is only one. >>> >>> Sent from my iPod >>> >>> On Jun 7, 2008, at 2:53 AM, Guy Bashan <[EMAIL PROTECTED]> wrote: >>> >>> Hi All, >>> >>> >>> >>> I am having a little problem with datatable and binding. >>> >>> >>> >>> Here is the code: >>> >>> <t:dataTable id="dayParts" >>> value="#{targetingParam.cmpTargetDayParts}" >>> >>> var="dayPart" cellpadding="0" cellspacing="0" >>> rowIndexVar="rowIndex"> >>> >>> <t:column style="height:30px" rendered="#{!dayPart.deleted}"> >>> >>> <h:selectOneMenu value="#{dayPart.startHour}" >>> onchange="updateTargetingActivity(#{rowIndexParam});" >>> >>> id="hourFrom" styleClass="mform" >>> style="width:75px;" converter="ByteConverter"> >>> >>> <f:selectItems value="#{cmp_targeting.dayPartHoursFrom}"/> >>> >>> </h:selectOneMenu> >>> >>> <div> >>> >>> <h:message for="dayParts" errorClass="error_message" /> >>> >>> </div> >>> >>> </t:column> >>> >>> </t:dataTable> >>> >>> >>> >>> It works all fine, and I see a table with values on the screen. Now, when I >>> add binding to the dropdown: >>> >>> binding="#{dayPart.htmlSelectOneMenuDaypartFrom}" >>> >>> >>> >>> I get the following exception: >>> >>> org.apache.jasper.el.JspPropertyNotFoundException: >>> /cmp_targeting.jsp(593,12) '#{dayPart.htmlSelectOneMenuDaypartFrom}' Target >>> Unreachable, identifier 'dayPart' resolved to null >>> >>> at >>> org.apache.jasper.el.JspValueExpression.setValue(JspValueExpression.java:91) >>> >>> at >>> org.apache.myfaces.application.ApplicationImpl.createComponent(ApplicationImpl.java:315) >>> >>> at >>> javax.faces.webapp.UIComponentELTag.createComponent(UIComponentELTag.java:91) >>> >>> at >>> javax.faces.webapp.UIComponentClassicTagBase.findComponent(UIComponentClassicTagBase.java:1101) >>> >>> at >>> javax.faces.webapp.UIComponentClassicTagBase.doStartTag(UIComponentClassicTagBase.java:431) >>> >>> at >>> org.apache.jsp.cmp_005ftargeting_jsp._jspx_meth_h_005fselectOneMenu_005f1(cmp_005ftargeting_jsp.java:5394) >>> >>> at >>> org.apache.jsp.cmp_005ftargeting_jsp._jspx_meth_t_005fcolumn_005f4(cmp_005ftargeting_jsp.java:5343) >>> >>> at >>> org.apache.jsp.cmp_005ftargeting_jsp._jspx_meth_t_005fdataTable_005f3(cmp_005ftargeting_jsp.java:5290) >>> >>> at >>> org.apache.jsp.cmp_005ftargeting_jsp._jspService(cmp_005ftargeting_jsp.java:1042) >>> >>> at >>> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70) >>> >>> at >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) >>> >>> at >>> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:393) >>> >>> at >>> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:320) >>> >>> at >>> org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266) >>> >>> at >>> javax.servlet.http.HttpServlet.service(HttpServlet.java:803) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) >>> >>> at >>> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654) >>> >>> at >>> org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:445) >>> >>> at >>> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:379) >>> >>> at >>> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:292) >>> >>> at >>> org.apache.myfaces.context.servlet.ServletExternalContextImpl.dispatch(ServletExternalContextImpl.java:338) >>> >>> at >>> org.apache.myfaces.application.jsp.JspViewHandlerImpl.buildView(JspViewHandlerImpl.java:481) >>> >>> at >>> org.apache.myfaces.application.jsp.JspViewHandlerImpl.renderView(JspViewHandlerImpl.java:334) >>> >>> at >>> org.apache.myfaces.lifecycle.RenderResponseExecutor.execute(RenderResponseExecutor.java:41) >>> >>> at >>> org.apache.myfaces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:140) >>> >>> at >>> org.apache.myfaces.custom.ppr.PPRLifecycleWrapper.render(PPRLifecycleWrapper.java:84) >>> >>> at >>> javax.faces.webapp.FacesServlet.service(FacesServlet.java:152) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) >>> >>> at >>> com.todacell.ui.view.filter.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:149) >>> >>> at >>> com.todacell.ui.view.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:61) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) >>> >>> at >>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) >>> >>> at >>> org.apache.myfaces.webapp.filter.ExtensionsFilter.doFilter(ExtensionsFilter.java:147) >>> >>> 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:233) >>> >>> at >>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) >>> >>> at >>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) >>> >>> at >>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) >>> >>> at >>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) >>> >>> at >>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:263) >>> >>> at >>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) >>> >>> at >>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:584) >>> >>> at >>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) >>> >>> at java.lang.Thread.run(Thread.java:619) >>> >>> >>> >>> In the bean I have the following code: >>> >>> private transient HtmlSelectOneMenu htmlSelectOneMenuDaypartFrom; >>> >>> >>> >>> public HtmlSelectOneMenu getHtmlSelectOneMenuDaypartFrom() >>> >>> { >>> >>> return htmlSelectOneMenuDaypartFrom; >>> >>> } >>> >>> >>> >>> public void setHtmlSelectOneMenuDaypartFrom(HtmlSelectOneMenu >>> htmlSelectOneMenuDaypartFrom) >>> >>> { >>> >>> this.htmlSelectOneMenuDaypartFrom = htmlSelectOneMenuDaypartFrom; >>> >>> } >>> >>> >>> >>> i:embed'> { >>> >>> this.htmlSelectOneMenuDaypartFrom = htmlSelectOneMenuDaypartFrom; >>> >>> } >>> >>> >> >> >> >> -- >> inexso - information exchange solutions GmbH >> Bismarckstraße 13 | 26122 Oldenburg >> Tel.: +49 441 4082 356 | >> FAX: +49 441 4082 355 | www.inexso.de >> >> > > > > -- > inexso - information exchange solutions GmbH > Bismarckstraße 13 | 26122 Oldenburg > Tel.: +49 441 4082 356 | > FAX: +49 441 4082 355 | www.inexso.de >
