Seam excel : "A worksheet's value must be an Iterable, DataModel or Query"

[eligriv]

Hi,

I would like to export a rich:datatable to an Excel file like in the seam-excel example but i keep getting
"org.jboss.seam.excel.ExcelWorkbookException: A worksheet's value must be an Iterable, DataModel or Query"


Here's the service feeding the datatable
`@Stateful
@Scope(ScopeType.SESSION)
@Name("previsionHydroServiceBS")
public class PrevisionHydroServiceBO implements PrevisionHydroServiceBS {

     @EJB
     private PrevisionHydroDAS previsionHydroDAS;

     @DataModel
     private Map<String, String> previsions;

// blabla

@Factory("previsions")
public void populatePrevisionList() {
// ...
}`



my datatable
`<r:dataTable id="table_previsions" value="#{previsions}" var="prev" rows="48">
  <r:column>
   <f:facet name="header">
    <h:outputText value="Tranche Horaire" />
   </f:facet>
   <h:outputText value="#{prev.key}" />
  </r:column>
  <r:column>
   <f:facet name="header">
     <h:outputText value="Prévision KW" />
   </f:facet>
   <h:outputText value="#{prev.value}" />
  </r:column>
</r:dataTable>`

the command button
`<h:commandButton action="#{excelExporter.export('table_previsions')}" />`
My button is in a <form> scope but not my datatable, but that's not the cause of the problem i think.


The exception says that i need to feed the seam excel with a datamodel, but my map is tagged @datamodel, so that's not so helpful.


I am relatively new at web developpement, so the problem might be any dumb mistake, and i am sorry if it is.

If someone could help me, i'd be grateful.

Thanks

ps : sorry, it seems that the markups are not working

[nickarls]

Hmmm. Can you access the Map directly (not as a @DataModel). I recall doing some changes that made use of the values() when given a Map as backing data...