I am trying to add an active class on the page the user is currently viewing but I can't manage to use the JSTL functions. What am I doing wrong?
xmlns:fn="http://java.sun.com/jstl/functions"
Using this in a h:link
styleClass="#{fn:containsIgnoreCase(request.requestURI,'index') ? 'active' : ''}"
causes this error:
styleClass="#{fn:containsIgnoreCase(request.requestURI,'index')}" Function 'fn:containsIgnoreCase' not found
You've got wrong import, it should be :
xmlns:fn="http://java.sun.com/jsp/jstl/functions"
You forgot about /jsp
Related
I'm writing a simple menu using PrimeFaces, and I'm wondering if I can access a tag attribute within itself. Let me explain:
...
<p:menuitem value="#{labels['menu.home']}" url="/pages/index.jsf"
styleClass="#{view.viewId == '/pages/index.jsf' ? 'nav-selected-menuitem' : ''}"/>
...
Since this will be repeated for more pages, is there a way to do something of the sort:
<p:menuitem value="#{labels['menu.home']}" url="/pages/index.jsf"
styleClass="#{view.viewId == url ? 'nav-selected-menuitem' : ''}"/>
Where url is the same url attribute in this p:menuitem tag.
Is this doable?
The component itself is available by #{component}.
So, this should do:
<p:menuitem ... url="/pages/index.jsf"
styleClass="#{view.viewId == component.url ? 'nav-selected-menuitem' : ''}" />
Noted should be that this may fail if the component's renderer is badly implemented (i.e. it doesn't properly do pushComponentToEL() as mandated by encodeBegin()). This is in turn worth an issue report at component library maintainer.
See also:
What exactly is #{component} in EL?
I am using PrimeFaces and JSF - I need to be able to set a component on the page as mandatory in response to an AJAX event. Is the best way to accomplish this using the following code or is there also a way to accomplish it using JQuery ?
Thanks
UIInput componentToChange = (UIInput) facesContext.getViewRoot().findComponent("ComponentId");
componentToChange.setRequired(true);
Thanks
Just set the component's required attribute with the desired EL expression.
E.g.
<h:inputText ... required="#{bean.required}" />
There are even EL ways without needing an additional bean property, but it's impossible to propose one based on the sparse information provided so far.
Use findComponent() with care. Think twice if it really can't be done just in the view (XHTML) side.
I have recently encountered a case where I wanted to set the index value from ui:repeat varStatus="v" using <h:inputHidden="#{v.index}/>. If you try this and execute the component using AJAX you will get an exception that the property is not writeable. While looking around I found that inputHidden supports a readonly="true" attribute that does just that making the error go away.
Is there a reason why this is not in documentation? (i.e. special, passthrough, other)
Is it safe to use?
After doing some digging Core JavaServer Faces 3e had this to say :
The h:inputHidden tag has the same attributes as the other input tags, except that it does not support the standard HTML and DHTML tags
So, the reason why readonly is not in the docs for inputHidden and also why it's not being rendered in your HTML is because inputHidden does not support it. This was also confirmed by Netbeans when I tried to add readonly as an attribute to inputHidden'(red squiggly lines with an error message). I was able to get that exception when I submitted a form with no setter defined for my bean property that was placed in inputHidden. Since inputHidden calls the setter when a form is submitted (for my case) and since none is defined in my code, it will of course throw that exception, namely:
javax.el.PropertyNotWritableException: /index.xhtml #14,56 value="#{bean.x}": The class 'Bean' does not have a writable property 'x'.
As for why it works when you do that I have no idea. Since you're worried about safety, I would suggest you do as BalusC says and simply use <input type="hidden"> or you define a setter for that property. Don't use it like that.
So long time since this question started, however just FYI, this works:
<h:inputHidden id="compId" readonly="#{true}" value="#{myBean.attribute}" />
i have a problem to generate dynamic menu, i'm using JSF1.2. I tried the c:forEach with an arrayList to generate dynamic rich:panelMenu as BalusC advised in a related forum, but get Accessor never triggered in c:forEach. it ruined me a day. can anyone provide me a solution ?
<c:forEach items="#{serviceListBean.services}" var="child">
<rich:panelMenuItem mode="none">
<h:outputText value="#{child.serviceId}"></h:outputText>
</rich:panelMenuItem>
</c:forEach>
what's wrong in this code? can anyone enlighten me?. For info, serviceListBean is request scoped bean.
Two possible causes:
JSTL is not declared as taglib in JSP or Facelets. To confirm this, rightclick page in browser and choose View Source. Do you see <c:forEach> tag unparsed among the generated HTML? If you're using JSP, declare it as follows:
<%#taglib prefic="c" uri="http://java.sun.com/jsp/jstl/core" %>
Or if you're using Facelets, declare it as follows in root element:
xmlns:c="http://java.sun.com/jsp/jstl/core"
On some servers like Tomcat, which doesn't ship with JSTL out the box, you would also need to install JSTL first, see also this info page.
This piece of code is in turn been placed inside a JSF repeating component, like <h:dataTable> with a var="serviceListBean". This is also not going to work. You would need to replace the JSF repeating component by <c:forEach> as well.
I have a custom facelet component (custom tag) but there is one thing that currently annoys me a lot. I'm trying to pass an action listener as a parameter to the custom tag, in order to make it more dynamic and just doesn't work.
Environment: JSF 1.2, IceFaces 1.8
Here's the way I'm trying to achieve this:
the command link uses the passed parameter 'paginationController'
<h:commandLink id="#{id}-link-three" value="click"
actionListener="#{paginationController.paginationLinkClicked}" />
the parameter 'paginationController' is passed like this:
paginationController="rowSelectController"
when I click the link, there's what I receive:
Received 'javax.el.MethodNotFoundException' when invoking action listener
'#{paginationController.paginationLinkClicked}' for component 'entity-list-apps-link-three'
2011-02-22 12:49:47,803 SEVERE [javax.faces.event] (http-127.0.0.1-8080-4)
javax.el.MethodNotFoundException: /WEB-INF/jsf/common/components/facelets
/applicationList.xhtml #107,71 actionListener="#{paginationController.paginationLinkClicked}":
Method not found: rowSelectController.paginationLinkClicked(javax.faces.event.ActionEvent)
So it seems that it successfully resolves the bean name to rowSelectController, but it complaints it can't find the method, and the method IS there!
One more thing, if I replace the parameter with the correct controller's name, it just works! Any ideas?
Because paginationController is variable you need to use the [] syntax here. Assuming paginationLinkClicked is a fixed method name:
<h:commandLink actionListener="#{paginationController['paginationLinkClicked']}" />
If paginationLinkClicked would also be variable, you need to omit the single quotes:
<h:commandLink actionListener="#{paginationController[paginationLinkClicked]}" />