Database driven combobox itemrenderer in DataGrid

Question

Hi
I created a database driven combobox itemrenderer, code see below:
The data is loaded and shown correctly, but when I change the combobox, suddenly a "0" appears:
I can see in the debugger in combobox1_changeHandler, that the correct data is taken from the combo "this.selectedItem.data=3;" and written to "data.professionGroup", (changed from "1" to "3")
but then when the code jumps to set data the "value.professionGroup" is "0"?!?!
Thank yor for any pointers!
The DataGrid:
    <mx:DataGrid id="personDg" dataProvider="{sm.persons}" width="100%" height="100%" editable="true">
         <mx:columns>
            <mx:DataGridColumn headerText="firstName" dataField="firstName"/>
             <mx:DataGridColumn headerText="lastName" dataField="lastName"/>
             <mx:DataGridColumn headerText="professionGroup" dataField="professionGroup" editable="true" editorDataField="data"
                 rendererIsEditor="true"
                 itemRenderer="com.xxx.view.components.combobox.ProfessionGroupCombo">
             </mx:DataGridColumn>
        </mx:columns>
     </mx:DataGrid>
The ItemRenderer:
<?xml version="1.0" encoding="utf-8"?>
<mx:ComboBox xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo"
     change="combobox1_changeHandler(event)"  initialize="combobox1_initializeHandler(event)" >
         <fx:Script>
             <![CDATA[
                 import mx.controls.dataGridClasses.DataGridListData;
                 import com.myfim.model.ShellModell;
                   import mx.events.ListEvent;
                    import mx.events.FlexEvent;
                 [Bindable]
                 private static var sm:ShellModell=ShellModell.getInstance();
                    public function setSelectedItemByValue(val:int):void{                                                                   
                         this.selectedIndex = -1; // Show prompt if value is not found
                         for (var i:int=0;i<this.dataProvider.length;i++){
                            if(this.dataProvider[i].data == val){
                                 this.selectedIndex = i;
                                 break;
                         }// for
                 override public function set data(value:Object):void{
                    super.data=value; // value is the VO!
                     setSelectedItemByValue(value.professionGroup);
                 protected function combobox1_changeHandler(event:ListEvent):void
                    data.professionGroup=this.selectedItem.data;                   
                    // I can see in the debugger that "data.professionGroup" gets the correct data f.e. ="3" , but if it jumps to the "set data" the                          value.professionGroup is "0" !??     
                protected function combobox1_initializeHandler(event:FlexEvent):void
                    this.dataProvider=sm.comboData.professionGroupAc;  // AC of (label, data)
             ]]>
         </fx:Script>
</mx:ComboBox>

Answer 1

Hi,
yupiiee! I found the answer by myself, I had to change
editorDataField="data" to editorDataField="value"
Thats all! Then it works!
Martin Zach