Navigation problems

[thelonius]

Hello everybody!
I recently started working with JBoss Seam and am amazed by the potential of this framework. However there is one issue I could not tackle so far. It is page navigation. I already read through quite some tutorials and examples and am convinced that my settings are correct, however when I run my website i do not get redirected.

(Code follows)
If I enter a search term on my home.xhtml and click the search button Seam does call the search function, however after it successfully finished (and found the correct amount of list items) I end up on the home.xhtml again, as if nothing happened, instead of being redirected to search_result.xhtml. This is only one example, redirects on other pages, like registration, do not work either.

Can anyone see what I am doing wrong?
Any help is greatly appreciated.
Cheers,
Ole

home.page.xml

<?xml version="1.0" encoding="UTF-8"?>  
 <page xmlns="http://jboss.com/products/seam/pages"  
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
       xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd">  
   
    <navigation from-action="#{itemFinder.search}">  
       <rule>  
          <redirect view-id="/search_result.xhtml"/>  
       </rule>  
    </navigation>  
   
 </page>

ItemFinderBean.java

 @Stateful  
 @Name("itemFinder")  
 public class ItemFinderBean implements ItemFinder {  
   
     static final String EJBQL = "select item from Item item ";  
   
     @PersistenceContext  
     EntityManager em;  
   
     @In  
     @Out(required = false)  
     String criteria;  
   
     @DataModelSelection  
     @Out(required=false)  
     Item item;  
   
     @DataModel  
     private List<Item> results;                   
   
     public void search() {                
         StringBuilder searchPattern = new StringBuilder();  
         searchPattern.append("%");  
         if (criteria != null && criteria.trim().length() != 0) {  
             searchPattern.append(criteria.toLowerCase().replace('*', '%')).append('%');  
         }  
         results = em.createQuery(EJBQL +  
                                              "WHERE lower(item.title) LIKE :search " +  
                                                "OR lower(item.description) LIKE :search")  
                 .setParameter("search", searchPattern.toString()).getResultList();  
     }  
   
     public void showItem() {  
         if (item == null) throw new ItemNotFoundException();  
     }  
   
     @Remove @Destroy  
     public void destroy(){}  
 }

Snippet from home.xhtml

 
<h:form>  
     <table>  
           <tr>  
                    <td><h1>Suche</h1></td><td><h:inputText value="#{criteria}" /></td>  
                    <td><h:commandButton type="submit" value="Finden!"  
                    action="#{itemFinder.search}" /></td>  
              </tr>  
         <tr><td></td><td><a >Erweiterte Suche</a></td></tr>                       
     </table>  
 </h:form>

[clerum]

Try

<page xmlns="http://jboss.com/products/seam/pages"  
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
       xsi:schemaLocation="http://jboss.com/products/seam/pages http://jboss.com/products/seam/pages-2.2.xsd">  
    
    <navigation from-action="#{itemFinder.search}">  
       <redirect view-id="/search_result.xhtml"/>  
    </navigation>
   
 </page>

I beleive if you are using <rule> you need to be either checking if-outcome or if

<xs:attributeGroup name="attlist.rule">
<xs:attribute name="if-outcome" type="pages:outcome-expression"/>
<xs:attribute name="if" type="pages:boolean-value-expression"/>
</xs:attributeGroup>

Since your method is void and you want to always redirect to /search_results.xhtml you don't need a rule. Your just triggering based on the action method which was called #{itemFinder.search}

[thelonius]

Hi Cody!
Thanks for your fast reply. Unfortunately the solution suggested does not work either. There is simply nothing happening (except the function being called).
However if I return a String in the function (return "/search_result.xhtml";) I get the intended result. But I would rather have the navigation rules detached from my functions, because I believe functions should only return values that are actually logically returned by the function, not those that just define the pageflow.

I read somewhere that an empty <rule> tag catches all non-null returns including voids, but a null return causes an error, if no <rule> tag is defined every return is being caught. So in my case the empty <rule> tag should have been identical to no <rule> tag, no?

--Ole

[thelonius]

Does anyone else maybe have an idea, why the xml-based navgiation does not work for me?