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;
>
> }
>
>
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