returned null;

[leonardo ginting]

dear master..


i have a problem with jsf and richfaces..
so when i clicked edit button it would be show pop up panel,,,
and then when i try update the data from the table and press save button
then i got this error

root cause

javax.el.PropertyNotFoundException: /admin/master_biaya/edit.xhtml @25,155 value="#{masterBiayaMBean.biaya.kelompokbiayaid.nama}": Target Unreachable, 'kelompokbiayaid' returned null

this is my code in edit.xhtml

  <h:selectOneMenu value="#{masterBiayaMBean.biaya.kelompokbiayaid.nama}" required="true" requiredMessage="Harus dipilih salah satu!" id="kelompok">
    <f:selectItem itemLabel="Pilih Kelompok Biaya" itemValue=""/>
    <f:selectItems value="#{masterBiayaMBean.namaBiaya}"/>
</h:selectOneMenu>

so when press save button on edit.xhtml (this is the code)

<a4j:commandButton value="Simpan" action="#{masterBiayaMBean.editBiaya}" reRender="tableBIAYA"
                         oncomplete="#{facesContext.maximumSeverity == null ? 'Richfaces.hideModalPanel(\'panelEdit\');' : ''}"/>

it would be navigate to
this backbean

 public void editBiaya(){
        
        try {
            biayaJpaController.edit(biaya);
        } catch (NonexistentEntityException ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        }
       
        try {
            kelompokBiayaJpaController.edit(kelompokBiaya);
        } catch (NonexistentEntityException ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            dokumenKeimigrasianJpaController.edit(dokim);
        } catch (NonexistentEntityException ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        }
     }
    

would you please tell me where i should fix the error,, please correct my code thanks a lot GB

[Tim Holloway]

masterBiayaMBean.biaya.kelompokbiayaid.nama

What the error is indicating is that the property named "biaya" in masterBiayaBean should be returning an object from its "getKelompokbiayaid" method and instead it's returning null. Or, in other words, biaya doesn't appear to be fully initialized.

[Wouter Oet]

Why are you doing this:

 
        try {
           someMethod();
        } catch (SomeSpecificException ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        } catch (Exception ex) {
            Logger.getLogger(MasterBiayaMBean.class.getName()).log(Level.SEVERE, null, ex);
        }
    

Instead of:

 
        try {
           someMethod();
        } catch (Exception ex) {
            Logger.getLogger(getClass().getName()).log(Level.SEVERE, "Insert message about what you're doing here", ex);
        }