[jboss-user] [JBoss Seam] - Re: Parameters not sent when using s:selectItems

[marius.oancea]

Problem is 99% solved by doing the following:

explicitelly added element convertor as Pete sugessted:
            <h:selectManyListbox id="theList" value="#{testAction.multiSelect}" >
  | 				<s:selectItems value="#{testAction.allElements}" var="element" label="#{element.name}" />
  | 				<f:converter converterId="elementConvertor" />
  | 			</h:selectManyListbox>



In param tag I called a convertor for the list parameter:
<?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-2.0.xsd">
  | 	<param name="theList" converterId="elementListConvertor" value="#{testAction.multiSelect}" />
  | </page>

The convertor is implemented as below:
  | @org.jboss.seam.annotations.faces.Converter
  | @Name("elementListConvertor")
  | public class ElementListParameterConvertor implements Converter, Serializable {
  |     @In
  |     private EntityManager entityManager;
  |    
  |     @Transactional
  | 	public Object getAsObject(FacesContext context, UIComponent component, String value) {
  | 		if (value != null) {
  | 			String[] allIds = value.split(" ");
  | 			List<Element> theList = new ArrayList<Element>();
  | 			for (int i = 0; i < allIds.length; i++) {
  | 				String id = allIds;
  | 				if (id == null || id.trim().length() == 0) continue;
  | 				theList.add(findElement(id));
  | 			}
  | 			return theList;
  | 		}
  | 		return null;
  | 	}
  | 
  | 	private Element findElement(String id) {
  |     	List<Element> allElements = TestAction.allElements;
  | 		for (int i = 0; i < allElements.size(); i++) {
  |     		if (allElements.get(i).getId().equals(new Integer(id))) return allElements.get(i);
  |     	}
  | 		return null;
  | 	}
  | 
  | 	public String getAsString(FacesContext context, UIComponent component, Object value) {
  | 		if (value instanceof List) {
  | 			List<Element> theList = (List<Element>) value;
  | 			String s = "";
  | 			
  | 			for (Iterator iterator = theList.iterator(); iterator.hasNext();) {
  | 				if (s.length() != 0) s += " ";
  | 				Element element = (Element) iterator.next();
  | 				s += element.id;
  | 				
  | 			}
  | 			return s;
  | 		}
  | 		return null;
  | 	}
  | 
  | }
  | 


Having that done, all works (without need for any conversation propagation and so on).

Also if you call in the browser "localhost:8080/test/xList.seam?theList=1%202" the entries in "select" are selected as expected.

The single point that does not work is the url when you submit the page:
 - point the browser to "localhost:8080/test/xList.seam?theList=1%202"
 - system shows first two entries in list selected (AS EXPECTED)
 - select the third entry and press submit
 - system update the browser location to "localhost:8080/test/xList.seam" (WRONG, the correct is localhost:8080/test/xList.seam?theList=1%202%203)

For input Fields and selectOne, the system behaves as expected - parameter is automatically added to the URL. The problem is specific to selectManyListbox component.

Additionally, if you have a :

		    <s:link view="/xList.xhtml" 
  | 		           	value="Test List" 
  | 			     	propagation="none"/>

the select multi parameter is not automatically added (while an input filed and selectOne is).


Thanx again to Pete Muir for give me the valuable hints.

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