I am trying to display a page where the user, by the appropriate selection using a radio button, sees either a textbox or a combo box. This is relatively easy and I managed to do that by the following code:
<h:selectOneRadio id="selection" value="#{inputMethod.choice}">
<f:selectItem itemValue="#{inputMethod.TEXT}" itemLabel="textbox"/>
<f:selectItem itemValue="#{inputMethod.COMBO}" itemLabel="combobox" />
<f:ajax event="click" execute="#this" render="#form" />
</h:selectOneRadio>
<h:panelGroup id="Textbox" rendered="#{inputMethod.choice==inputMethod.TEXT}">
<h:outputLabel>Textbox:</h:outputLabel>
<h:inputText value="#{myBean.somevalue}" />
</h:panelGroup>
<h:panelGroup id="Combobox" rendered="#{inputMethod.choice==inputMethod.COMBO}">
<h:outputLabel Combobox:/>
<h:selectManyListbox id="CommunityListbox" value="#{myBean.choices}">
<f:selectItems value="#{myBean.selections}" var="u" itemValue="#{u.id}" itemLabel="#{u.name}"/>
</h:selectManyListbox>
</h:panelGroup>
The problem I have is that the setter for the combo box is never called.
In fact, the setter is only called for the component that is rendered by default (in this case whenever inputMethod.choice==inputMethod.TEXT). If I remove the conditional rendering, all setters are called as one would expect.
Any ideas or answers will be greatly appreciated!
PS: I am using jsf2.0, Glassfish 3.1, Netbeans 7.0 (in case this is of any importance)
You need to ensure that #{inputMethod.choice} evaluates exactly the same during the request of processing the form submit as it did during the request of displaying the form. Easiest is to put the bean in the view scope or to move the initialization logic into the (post)constructor of the request scoped bean.
Related
Render works fine during initial load of the page, but once the form has been submitted and some component failed a validation re-render does not trigger, the panel does not show and hide anymore and page must be refreshed again. I'm still new with jsf.
Sample Code
<p:selectOneRadio id="accommodationOptions" value="#{travelRequestMBean.accommodationOptions}">
<f:selectItem itemLabel="#{field['accord3Radio2']}" itemValue="2" />
<f:selectItem itemLabel="#{field['accord3Radio1']}" itemValue="1" />
<f:ajax render="panelMoreAccommodation2"/>
</p:selectOneRadio>
<p:panel id="panelMoreAccommodation2" widgetVar="panelMoreAccommodation2"
visible="#{travelRequestMBean.accommodationOptions == 1}" closable="true" toggleable="true">
<p:graphicImage url="/images/hotel-noun_project_4398.svg" alt="#{field['accord3Label2']}" height="24px" />
<h:outputText value="#{field['accord3Label2']}" />
</p:panel>
Also I have tried the other variant of this using a boolean attribute in the backing bean with an ajax event on the selectoneradio, result was still the same and panel does not do anything.
I can't see where you validate your inputs. But take a look at http://www.primefaces.org/showcase/ui/csv/basic.xhtml with the combination of
update=":panelMoreAccommodation2"
And instead of visible use render.
Finally having some tweaks, the problem was this attribute on the target panel
closable="true"
After removing this attribute the ajax update worked again even after a submit with a failed validation.
I want to render a single component (h:selectManyCheckbox) inside a form based on a check-box that I select or not.
<h:form>
<h:selectBooleanCheckbox value="#{bean.var}">
<f:ajax event="click" render="employeeCheckboxes" />
</h:selectBooleanCheckbox>
<h:selectManyCheckbox
id="employeeCheckboxes"
value="#{bean.checkboxes}"
rendered="#{var}">
</h:selectManyCheckbox>
</h:form>
However, the component isn't re-rendered on selecting or deselecting the check-box. I can however re-render the whole form but I don't want that.
You can't reference a component in <f:ajax render> which is in first place never rendered in HTML output. The <f:ajax render> uses under the covers JavaScript document.getElementById() to find the HTML element in order to update it with the new HTML structure from the ajax response. However, if a JSF component is in first place never rendered in HTML output, then JavaScript can't find it anywhere either.
You need to wrap it in another component which is always rendered.
<h:form>
<h:selectBooleanCheckbox value="#{bean.var}">
<f:ajax render="employeeCheckboxesGroup" />
</h:selectBooleanCheckbox>
<h:panelGroup id="employeeCheckboxesGroup">
<h:selectManyCheckbox
id="employeeCheckboxes"
value="#{bean.checkboxes}"
rendered="#{bean.var}">
</h:selectManyCheckbox>
</h:panelGroup>
</h:form>
(note that I removed event="click" as it's the default already)
See also:
Why do I need to nest a component with rendered="#{some}" in another component when I want to ajax-update it?
Hi i think you missed managed bean name in
rendered attribute
of checkbox tag.
In my JSF application if I refresh the page everything get's rendered exceted the primeface graphicimages and jsf <f:ajax /> isn't working. If I wait 5 seconds the ajax calls are working again and graphicimages are getting loaded.
Another example is when I upload an image. The image get procced, uploaded and the site get's refreshed. After this the image is displayed, but ajax calls won't work after a few seconds after.
The app runs on a JBoss 7.1 with JSF 2.1
Is this a problem with slow hardware or something else. I would be happy with any hints because I don't really know where to look for a solution.
Example:
<p:selectOneRadio id="options" value="#{gameWriter.uploadCover}">
<f:selectItem itemLabel="ja" itemValue="true"/>
<f:selectItem itemLabel="nein" itemValue="false"/>
<f:ajax/>
</p:selectOneRadio>
When you define the f:ajax, try to give the UI components you want to execute and update. Also give the event. If you want process the whole form and update the whole page, you can use #form and #all in the f:ajax.
An example with #form and #all with f:ajax is as follows.
<h:form>
<p:selectOneMenu id="cmb" value="#{investigationItemController.current}" >
<f:selectItem itemLabel="Please select an item" />
<f:selectItems value="#{investigationItemController.items}" var="ii" itemLabel="#{ii.name}" itemValue="#{ii}" />
<f:ajax event="change" execute="#form" render="#all"/>
</p:selectOneMenu>
<h:outputLabel id="lbl" value="#{investigationItemController.current}" />
</h:form>
An example with primefaces ajax command is as follows.
<h:form>
<p:selectOneMenu id="cmb" value="#{investigationItemController.current}" >
<f:selectItem itemLabel="Please select an item" />
<f:selectItems value="#{investigationItemController.items}" var="ii" itemLabel="#{ii.name}" itemValue="#{ii}" />
<p:ajax event="change" process="cmb" update="lbl"/>
</p:selectOneMenu>
<h:outputLabel id="lbl" value="#{investigationItemController.current}" />
</h:form>
We can add more than one or for one UI Component if we want to execute the logic for more than one event.
Events for standard JSF UI component can be taken after removing the 'on' from the list of attributes of the UI component starting with 'on'. For example if JSF UI support onChange as an attribute you can use event="change".
For primefaces UI components, the possible events are listed under Primefaces documentation.
It is essential to correctly select the event in order for a successful ajax response.
This is the code:
<h:form id="articleForm" >
<p:commandButton value="Select tags" ajax="true" >
<f:ajax execute="#form" render="#form :articleForm:tags" />
</p:commandButton>
<p:pickList id="tags" value="#{articleController.dualListModelForTags}" var="tag" itemLabel="#{tag.tag}" itemValue="#{tag}" converter="distinctTagConverter">
<f:facet name="sourceCaption">Distinct tags</f:facet>
<f:facet name="targetCaption">Connected tags</f:facet>
</p:pickList>
</h:form>
When the commandbutton is clicked, the getDualListModelForTags() in the backing bean is called and executed. In getDualListModelForTags() I make some modifications so I want the picklist to be updated. But the picklist(id=tags) is not rendered again. Only when I refresh the page, are the modifications made to the picklist.
The PrimeFaces <p:commandButton> component doesn't work together with <f:ajax>. You need to use the button's own ajax-targeted attributes instead. Instead of the <f:ajax execute> you should use <p:commandButton process>. But this already defaults to #form, so you can omit it. Instead of the <f:ajax render> you should use <p:commandButton update>. Specifying client IDs which are already covered by #form is unnecessary, so just #form is sufficient. Also the ajax="true" attribute is unnecessary as that's the default already.
So just this should do:
<p:commandButton value="Select tags" update="#form" />
Unrelated to the concrete problem, you're doing the business job inside a getter method. This is a bad idea. Do it in the button's action method instead. You also seem to be using a session scoped bean for view scoped data. This is a bad idea. Put the bean in the view scope instead.
I have the following code:
<h:commandLink action="#{testBean.showSomething}">
Do Stuff
</h:commandLink>
which does what I want (change the state of testbean and reload the page which will show a different set of divs. because of their "rendered" properties)
Now I want to use ajax to accomplish this so I did this:
<h:commandLink action="#{testBean.showSomething}">
<f:ajax event="click" render=":content" />
Do Stuff
</h:commandLink>
However this causes the showSomething method to not even be called.
IMHO what I want to do is rather simple but I can't for the life of me figure out how to do it.
You need to use event="action" instead of event="click". You could even omit it altogether. It's namely the default event the <f:ajax> is listening on when nested in an UICommand component.
<h:commandLink action="#{testBean.showSomething}">
<f:ajax render=":content" />
Do Stuff
</h:commandLink>