[jboss-user] [JBoss Seam] - Exception with SelectManyCheckbox

Fri Aug 24 03:18:54 EDT 2007

Hello !!!!!!

I have a list of report(already persist in database), and I want to display them on a jsf page with selectManyCheckbox.But when I want to acces to the page I have this exception : 

Exception during request processing: javax.servlet.ServletException: Expected a child component type of UISelectItem/UISelectItems for component type javax.faces.SelectMany(j_id28). Found null.

My jsf page : 

  | <html xmlns="http://www.w3.org/1999/xhtml"
  |       xmlns:ui="http://java.sun.com/jsf/facelets"
  |       xmlns:h="http://java.sun.com/jsf/html"
  |       xmlns:f="http://java.sun.com/jsf/core">
  |     
  |     <body>
  |         
  |         <ui:composition template="templates/client.xhtml">
  |             
  |             <ui:define name="servicesclients">
  |                 
  |             <h:form>
  |                 
  |                  <h:selectManyCheckbox value="#{reports}">
  |                     <f:selectItems itemValue="#{reporte}" var="rep" itemLabel="#{rep.descReport}"/>
  |                 </h:selectManyCheckbox>
  |                              
  |               
  |                 
  |             </h:form>
  |                 
  | 
  |             </ui:define>
  | 
  |         </ui:composition>
  |         
  |     </body>
  | </html>
  | 

My entity : 

  | 
  | @Entity
  | @Name("Report")
  | public class Report implements Serializable {
  | 
  |     @Id
  |     @GeneratedValue(strategy = GenerationType.AUTO)
  |     private Long reportId;
  |     private String repName;
  |     private String descReport;
  |     
  |     /**
  |      *Creates the foreign key in relation to the category table 
  |      */
  |     @OneToMany (mappedBy = "reportId")
  |     private List<Category> categories;
  |     
  |     /**
  |      *Creates the foreign key in relation to the ContactReportBinder table 
  |      */
  |     @ManyToOne
  |     @JoinColumn (name = "binderId_fk")
  |     private ContactReportBinder binderId;
  |     
  |     /** Creates a new instance of Report */
  |     public Report() {
  |     }
  | 
  | Then Getters and setters
  | 

and My Bean : 

  | @Stateless
  | @Name("ReportManager")
  | @Scope(CONVERSATION)
  | public class ReportManager implements com.pingwy.web.front.ReportManagerLocal, Serializable {
  |     
  |     /**
  |      * Creates a new instance of ReportManager
  |      */
  |    
  |     @In
  |     private EntityManager em;
  |     
  |     @DataModel @Out(required = false) private List<Report> reports;
  |     
  |     @DataModelSelection @Out(required = false) @In(required = false) SelectItem reporte;
  |    
  |     @Factory("reports")
  |     public List<Report> getReports() {
  |         
  |         
  |         return em.createQuery("select r from Report r").getResultList();
  |         
  |     }
  | 
  |     public void setReports(List<Report> reports) {
  |         
  |         this.reports = reports;
  |     }
  | 
  |     
  | 
  |     public SelectItem getReporte() {
  |         return reporte;
  |     }
  | 
  | 

Thanks for your help in advance.

Yohann

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