Relating 2 tables with one List Control

Question

I am testing the new data services in FB4 with PHP.   I have created a simple List control that displays a mySQL list  -- which works fine.
When I double click on an item in the list, I want to use it as the search index for a second table. I use the doubleclick event to make the call to search the second table.
I set the dataprovider of the same List control to the new search result array returned from the second table.   This does not work.
The Individual search code to each table work fine, but calling the second search in the doublclick event function does not.
any examples would be appreciated.

Answer 1

Thanks for your help.   My code is below:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/halo" minWidth="1024" minHeight="768" height="314" width="574" xmlns:categories="services.categories.*" xmlns:subcategories="services.subcategories.*">
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.events.FlexEvent;
import mx.events.IndexChangedEvent;
import com.adobe.serializers.utility.TypeUtility;
import mx.controls.Alert;
protected function connectToData(event:FlexEvent):void
getAllItemsResult.token = categories.getAllItems();
protected function list1_doubleClickHandler(event:MouseEvent):void
var item:* = category.dataProvider.getItemAt(category.selectedIndex);
getAllItemsResult2.token = subcategories.getAllItems(item.id);
category.dataProvider = TypeUtility.convertToCollection(getAllItemsResult2.lastResult);
category.labelField = "name";
]]>
</fx:Script>
<fx:Declarations>
<s:CallResponder id="getAllItemsResult"/>
<categories:Categories id="categories" destination="categories" endpoint="http://springblue/justin/flex/groupbrowser/bin-debug/gateway.php" fault="Alert.show(event.fault.faultString)" showBusyCursor="true" source="categories"/>
<s:CallResponder id="getAllItemsResult2"/>
<subcategories:Subcategories id="subcategories" destination="subcategories" endpoint="http://springblue/justin/flex/groupbrowser/bin-debug/gateway.php" fault="Alert.show(event.fault.faultString)" showBusyCursor="true" source="subcategories"/>
</fx:Declarations>
<s:List x="25" y="28" height="265" width="525" id="category" doubleClickEnabled="true" doubleClick="list1_doubleClickHandler(event)" creationComplete="connectToData(event)" dataProvider="{TypeUtility.convertToCollection(getAllItemsResult.lastResult)}" labelField="category_name" contentBackgroundColor="#E5E5E5"/>
</s:Application>