<h:outputLink value="#{beanname.path}">
<h:outputText value="Output label"></h:outputText>
<f:param name name="name" value="tommy"/>
</h:outputLink>
http://127.0.0.1:7101/projectt/faces/index.jsp?name=tommy
my URL appears with the param value. I want to hide it in the URL and get it in the bean class.
So, you want a POST request? Use <h:commandLink> instead.
<h:form>
<h:commandLink value="Output label" action="#{beanname.outcome}">
<f:param name name="name" value="tommy"/>
</h:commandLink>
</h:form>
The parameter can be set as
#ManagedProperty("#{param.name}")
private String name;
or can passed by <f:setPropertyActionListener> instead:
<h:form>
<h:commandLink value="Output label" action="#{beanname.outcome}">
<f:setPropertyActionListener target="#{beanname.name}" value="tommy"/>
</h:commandLink>
</h:form>
or when you're already on a Servlet 3.0 / EL 2.2 capable container (Tomcat 7, Glassfish 3, etc), just pass it as action method argument:
<h:form>
<h:commandLink value="Output label" action="#{beanname.outcome('tommy')}" />
</h:form>
with
public String outcome(String name) {
// ...
return "index";
}
Related
This question already has answers here:
commandButton/commandLink/ajax action/listener method not invoked or input value not set/updated
(12 answers)
Closed 5 years ago.
I have a jsf page where I have this form :
<h:commandButton id="submit" value="Submit">
<h:inputText id="locationInputId" value="#{historicCtrl.historic.search}" ></h:inputText>
<f:ajax event="click" render="resultGroup" listener="#{cSVobjectCtrl.doRender}"/>
<label for="lat">Latitude</label>
<h:inputText id="lat" value="#{cSVobjectCtrl.lat}"/>
<label for ="lng">Longitude</label>
<h:inputText id="lng" value="#{cSVobjectCtrl.lng}"/>
<f:actionListener binding="#{historicCtrl.insertSearch(2)}"/>
</h:commandButton >
The problem is that the line :
< f:actionListener binding="#{historicCtrl.insertSearch(2)}"/>
Is ignored and I don't know why.
I tried a easier version of the code :
<h:form>
<h:outputText value="Lieu"/>
<h:inputText id="login" value="#{historicCtrl.historic.search}" required="true"></h:inputText>
<br/>
<h:commandButton value="Search">
<h:outputText id ="textToInsertId" value="#{historicCtrl.insertSearch(2)}"/>
</h:commandButton>
</h:form>
This one is working, I can see the trace that the method is supposed to print on the console and I have the insertion in my database.
On the opposite the first code that I wrote in the message isn't working as expected. Indeed, all is working naturally except the f;actionListener as I explain above.
Why is this instruction ingnored ?
Your code is really confusing, but I'll concentrate on the question and provide an example of how your code should propably look like.
If you want to bind an actionListener you have to bind it to an object that implements ActionListener-Interface and not to a method, for example:
facelet
<f:actionListener binding="#{historicCtrl}" />
ActionListener
#ManagedBean
#ViewScoped
public class HistoricCtrl implements Serializable, ActionListener {
private static final long serialVersionUID = 6307961450435094233L;
#Override
public void processAction(ActionEvent e) throws AbortProcessingException {
// TODO implement
}
}
If you use binding you can't pass an argument to your actionListener. The better approach is to use actionListener attribute of h:commandButton. In this case your code should look like this:
<h:form id="form">
<h:inputText id="locationInputId" value="#{historicCtrl.historic.search}" />
<br />
<h:outputLabel for="lat" value="Latitude" />
<h:inputText id="lat" value="#{cSVobjectCtrl.lat}"/>
<br />
<h:outputLabel for="lng" value="Longitude" />
<h:inputText id="lng" value="#{cSVobjectCtrl.lng}"/>
<br />
<h:commandButton id="submit" value="Submit" actionListener="#{historicCtrl.insertSearch(2)}">
<f:ajax execute="form" render="resultGroup" listener="#{cSVobjectCtrl.doRender}"/>
</h:commandButton>
</h:form>
I'm facing problem with passing object to backing bean from actionListener in commandLink. What I have, is a bean MeasureBean and a xhtml file, that uses the bean.
In the xhtml I have:
<p:selectOneListbox var="ch">
<f:selectItems value="#{MeasureBean.checkpoints}" var="cp" itemValue="#{cp}" />
<p:column>
<h:outputText value="#{ch.name}" />
</p:column>
<p:column>
<h:commandLink actionListener="#{MeasureBean.onCheckpointRemoved(ch)}">
<h:graphicImage library="#{ctx.theme}" name="images/delete.gif" />
<f:ajax event="click" />
</h:commandLink>
</p:column>
</p:selectOneListbox>
In the bean I have method:
public void onCheckpointRemoved(Checkpoint viewCheckpoint) {
System.out.println(viewCheckpoint);
// TODO
}
The problem is, that regardless of whethert I use the tag <f:ajax> or not, the parameter viewCheckpoint of the method in bean is always null. I need to pass that parameter to the bean. It doesn't have to be the whole object, it is allowed to pass just the id of the checkpoint. What I also tried, was:
<h:commandLink actionListener="#{MeasureBean.onCheckpointRemoved(cp)}">
(cp instead of ch). But no difference.
Please help,
Mateusz
You forgot to set the value of <p:selectOneListBox>. Also, you'll have to create a converter.
You can check an example of converter in PrimeFaces Showcase
<p:selectOneListbox var="ch" value="#{MeasureBean.checkPointTest}" converter="checkPointConverter">
<f:selectItems value="#{MeasureBean.checkpoints}" var="cp" itemValue="#{cp}" />
<p:column>
<h:outputText value="#{ch.name}" />
</p:column>
<p:column>
<h:commandLink actionListener="#{MeasureBean.onCheckpointRemoved(ch)}">
<h:graphicImage library="#{ctx.theme}" name="images/delete.gif" />
<f:ajax event="click" />
</h:commandLink>
</p:column>
</p:selectOneListbox>
Checkpoint checkPointTest;
// getter/setter....
public void onCheckpointRemoved(Checkpoint viewCheckpoint) {
System.out.println(viewCheckpoint);
// TODO
}
One of the most common approaches to change locale in JSF+Seam - with <h:selectOneMenu>:
<h:form action="#{localeSelector.select}" rendered="false">
<h:selectOneMenu value="#{localeSelector.language}" onchange="submit()">
<f:selectItem itemLabel="English" itemValue="en" />
<f:selectItem itemLabel="Francais" itemValue="fr" />
</h:selectOneMenu>
</h:form>
I want to implement locale changes with buttons. So, the question is - how to pass the parameter (en, fr, etc.) to update the bean with <h:commandButton>? Maybe <h:inputHidden> would help?
Either pass as method argument (only if your environment supports EL 2.2),
<h:commandButton value="English" action="#{localeSelector.change('en')}" />
<h:commandButton value="Deutsch" action="#{localeSelector.change('de')}" />
<h:commandButton value="Français" action="#{localeSelector.change('fr')}" />
with
public void change(String language) {
locale = new Locale(language);
// ...
}
Or use <f:setPropertyActionListener>
<h:commandButton value="English" action="#{localeSelector.change}">
<f:setPropertyActionListener target="#{localeSelector.language}" value="en" />
</h:commandButton>
<h:commandButton value="Deutsch" action="#{localeSelector.change}">
<f:setPropertyActionListener target="#{localeSelector.language}" value="de" />
</h:commandButton>
<h:commandButton value="Français" action="#{localeSelector.change}">
<f:setPropertyActionListener target="#{localeSelector.language}" value="fr" />
</h:commandButton>
with
private String language;
public void change() {
locale = new Locale(language);
// ...
}
Or use <f:param>
<h:commandButton value="English" action="#{localeSelector.change}">
<f:param name="language" value="en" />
</h:commandButton>
<h:commandButton value="Deutsch" action="#{localeSelector.change}">
<f:param name="language" value="de" />
</h:commandButton>
<h:commandButton value="Français" action="#{localeSelector.change}">
<f:param name="language" value="fr" />
</h:commandButton>
with
public void change() {
locale = new Locale(FacesContext.getCurrentInstance().getExternalContext().getRequestParameterMap().get("language"));
// ...
}
(you can also let JSF automatically set it by a #ManagedProperty("#{param.language}"), but this requires the bean to be request scoped, or a <f:viewParam>, see also ViewParam vs #ManagedProperty(value = "#{param.id}"))
Enough ways to pass a parameter from view to controller. Take your pick. The <h:inputHidden> serves in JSF context a somewhat different purpose and it can only be manipulated by JavaScript in the onclick which is ugly.
I'd like to change the "required" property of an InputText that is located within an ui:repeat, but I'm not able to access to the component from the ManagedBean:
<h:selectManyCheckbox id="required" value="#{test.required}"
layout="lineDirection" converter="javax.faces.Integer">
<f:ajax event="change" listener="#{test.update}" />
<f:selectItems value="#{test.selectable}"></f:selectItems>
</h:selectManyCheckbox>
<ui:repeat value="#{test.names}" var="name" id="repeat">
<h:panelGrid columns="3">
<h:outputLabel id="nameLabel">name:</h:outputLabel>
<h:inputText id="name" value="#{name}"
validator="#{test.validateName}" />
<h:message for="name"></h:message>
</h:panelGrid>
</ui:repeat>
I'm trying to use the findComponent method, but it does not work:
public void update(AjaxBehaviorEvent event) {
for(Integer i: selectable) {
UIViewRoot vr = FacesContext.getCurrentInstance().getViewRoot();
HtmlInputText input = (HtmlInputText)vr.findComponent("form:repeat:"+i+":name");
input.setRequired(required.contains(i));
}
}
The ui:repeat doesn't repeat the components in the view root, it repeats the component's output in the rendered HTML output.
There are several ways to achieve this properly. One of them is to use a value object instead and set the requireness there. E.g. a List<Item> wherein Item has the properties String name and boolean required.
<ui:repeat value="#{test.items}" var="item" id="repeat">
<h:panelGrid columns="3">
<h:outputLabel id="nameLabel">name:</h:outputLabel>
<h:inputText id="name" value="#{item.name}" required="#{item.required}" validator="#{test.validateName}" />
<h:message for="name"></h:message>
</h:panelGrid>
</ui:repeat>
There are more ways, but since the JSF version you're using and the functional requirement is unclear, it's only guessing which way is the most applicable in your case.
I am trying to access the value of the expression $result.id and use that value and pass it in the bean action commitBtn. how do I go about doing this.
<c:forEach items="${bean.results}" var="result">
<fieldset>
<legend>
<b>Title:</b>
${result.id}
<c:set var="Id" value="${result.id}" />
<!-- this Id doesn't show as well, why -->
<h:outputText value="#{Id}" binding="#{bean.Id_lbl}" id="iD_lbl" />
<h:commandButton value="Commit" binding="#{bean.commitBtn}"
id="commitBtn" action="#{bean.commitBtn}" />
</legend>
...
Use the <f:param> tag to pass the value to the action. Within the action you will have to get the param value from the requestMap
something like:
<h:commandButton blah blah blah>
<f:param name="resultId" value="${result.id}" />
</h:commandButton>
then in action code:
resultId = FacesContext.getCurrentInstance().getExternalContext().getRequestMap().get("resultId");
The f:param as some may suggest does not work in a h:commandButton in JSF 1.x. Use f:setPropertyActionListener instead:
<h:commandButton value="Commit" binding="#{bean.commitBtn}" id="commitBtn" action="#{bean.commitBtn}">
<f:setPropertyActionListener target="#{bean.resultId}" value="#{result.id}" />
</h:commandButton>
Also see this article for more hints.