f:param does not pass parameter or the parameter does not get set

Question

I use h:link with includeViewParams=true to navigate between my list and view pages and make the view page URLs bookmarkable but it doesn't work. Below is related portion of my code:

in layout.xhtml (my template):

<f:view locale="#{localeBean.lang}"> <ui:insert name="metadata"/>

in Articles.xhtml (my list page):

<h:form> <p:datagrid var="item" value="articleController.items"> <p:column> <h:link outcome="View_Articles?faces-redirect=true&amp;includeViewParams=true" styleClass="view-details"> <h:outputText value="#{item.title}"/> <f:param name="id" value="#{item.articleId}"/> </h:link> </p:column> </p:datagrid> </h:form>

in View_Article.xhtml (my view details page):

<ui:composition template="./WEB-INF/templates/layout.xhtml"> <ui:define name="metadata"> <f:metadata> <f:viewParam name="id" value="#{articleController.id}" /> <f:viewParam name="id" value="#{articleLclController.id}"/> </f:metadata> </ui:define>

Further information: I use JSF 2.2, ocpsoft rewrite filter, primefaces library, and ArticleController.java is session scoped.

I have tried the following:

1- I used h:commandLink; with this, the navigation worked but the URL didn't include view-params

Articles.xhtml:

<h:commandLink id="viewArticleDetails" action="#{articleController.viewArticleByID()}" styleClass="view-details"> <h:outputText value="View Details"/> <f:setPropertyActionListener target="#{articleController.id}" value="#{item.articleId}"/> <f:setPropertyActionListener target="#{articleLclController.id}" value="#{item.articleId}"/> </h:commandLink>

ArticleController.java: ...

private Long id; public Long getId() { return id; } public void setId(Long id) { this.id = id; current = ejbFacade.find(id); } public String viewArticleByID(){ return "View_Article?faces-redirect=true&amp;includeViewParams=true"; } ...

I expected the URL to be http://localhost:8080/testApp/en/View_Article?id=1 but it was like `http://localhost:8080/testApp/en/View_Article

2- I inserted http://localhost:8080/testApp/en/View_Article?id=1 and it worked in both cases.

Community · Accepted Answer · 2017-05-23 10:31:41Z

The includeViewParams parameter works only for view parameters which are already in the given view (in your case, Articles.xhtml, where you haven't got any of them). Just pass them as f:param. As you want to perform a plain GET request, your best is to go with h:link:

<h:link outcome="View_Articles" styleClass="view-details"> <h:outputText value="#{item.title}"/> <f:param name="id" value="#{item.id}" /> </h:link>

That way you'll obtain item's id at your destination page, but is not enough to have the url changed in the address bar. To achieve that add ?faces-redirect=true to your outcome to force a redirection.

See also:

I changed my code in Articles.xhtml to <h:link outcome="View_Article?faces-redirect=true&includeViewParams=true" styleClass="view-details"> <h:outputText value="View Details"/> <f:param name="id" value="#{item.articleId}"/> </h:link> but it still doesn't work. Btw my bean is session scoped.
This way is intended to work with view scoped. Why are you using session scope for dealing with view specifics?
I changed my beans to view scoped and googled through this til now but it still doesn't work. The problem I think is that f:param does not set item.articleId to id and thus it returns null. Or it might be f:viewParam that does not set id because I noticed that setId is never called.

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