Hi folks,

i started with Richfaces and JSF a few months ago and it's really fun. I always was able to find a solution for any problem, but now i'm stuck. Maybe someone has an idea on the following problem.

I use some ExtendedDataTables to implement filters in a project. I use the example from the JBoss showcase. The Problem is, that in my backing bean, the getRowKey Method always returns null. Here is my code:

<rich:extendedDataTable frozenColumns="2"

                                    styleClass="filterTable"

                                    value="#{jobspecFilterController.getBusinessList()}"

                                    var="business" rendered="true" selectionMode="single"

                                    id="bussinessTable" selection="#{jobspecFilterController.businessSelection}">

                                    <a4j:ajax execute="@form" event="selectionchange"

                                        listener="#{jobspecFilterController.selectionListener}"

                                        render="secondTable"/>

                                    <f:facet name="header">

                                        <h:outputText value="Business" />

                                    </f:facet>

                                    <rich:column width="30px">

                                        <f:facet name="header">

                                            <h:selectBooleanCheckbox id="selectAllBusinesses"

                                                title="select all"

                                                value="#{jobspecFilterController.selectAllBusinesses}">

                                                <a4j:ajax event="valueChange"

                                                    listener="#{jobspecFilterController.checkboxListener}"

                                                    execute="@form" render="@form"

                                                    onbegin="#{rich:component('waitPopup')}.show()"

                                                    oncomplete="#{rich:component('waitPopup')}.hide()" />

                                            </h:selectBooleanCheckbox>

                                        </f:facet>

                                        <h:selectBooleanCheckbox id="selectBusiness"

                                            value="#{jobspecFilterController.businesses[business]}">

                                            <a4j:ajax event="valueChange"

                                                listener="#{jobspecFilterController.checkboxListener}"

                                                execute="@form" render="@form"

                                                onbegin="#{rich:component('waitPopup')}.show()"

                                                oncomplete="#{rich:component('waitPopup')}.hide()" />

                                            <f:attribute name="node" value="#{business}" />

                                        </h:selectBooleanCheckbox>

                                    </rich:column>

                                    <rich:column width="200px">

                                        <f:facet name="header"></f:facet>

                                        <h:commandLink id="linkBusiness" value="#{business.name}"

                                            action="#{jobspecFilterController.fillTable(business)}"

                                            rendered="true" />

                                    </rich:column>

                                </rich:extendedDataTable>

public void selectionListener(AjaxBehaviorEvent event) {

        if (!businessSelection.isEmpty()) {
            UIExtendedDataTable dataTable = (UIExtendedDataTable) event.getComponent();
            Object originalKey = dataTable.getRowKey();
            String id = dataTable.getId();
            // do something...
            dataTable.setRowKey(originalKey);
        }

    }

Thanks in advance!