Question

Include tree page (List, View, Edit) in index and used same command tow page (List and View) .When I List.xhtml page ‘s View or Edit button click and open it; but View.xhtml page’s Edit button click then show in flowing massage:

Unable to find matching navigation case with from-view-id '/index.xhtml' for action '#{instituteController.viewEdit}' with outcome 'null'

.

I want View page’s Edit button click to edit page open into index page.
List.xhtml code:

<h:commandButton action="#{instituteController.prepareView}" value="#{bundle.ListInstituteViewLink}">
   <f:ajax execute="@form" render="@form"/>
</h:commandButton>

<h:commandButton action="#{instituteController.prepareEdit}" value="#{bundle.ListInstituteEditLink}">
    <f:ajax execute="@form" render="@form"/>
</h:commandButton>

View.xhtml code

 <h:commandButton action="#{instituteController.viewEdit}" value="#{bundle.ListInstituteEditLink}">
 <f:ajax execute="@form" render="@form"/>
</h:commandButton>

instituteController.java code:

   public String prepareEdit() {
    current = (Institute) getItems().getRowData();
    selectedItemIndex = pagination.getPageFirstItem() + getItems().getRowIndex();
    return "index";
}
 public String viewEdit() {

          return "null";
}

If I return “index” ; this command don’t work. Again show this code:

          public String viewEdit() {

          return "index";
          }

Answer 1

Your mistake is here:

public String viewEdit() {
    // ...
    return "null";
}

You’re returning a String instance with value of "null". This is not the same as the literal null.

Fix it accordingly:

public String viewEdit() {
    // ...
    return null;
}

or just return nothing:

public void viewEdit() {
    // ...
}