Can't create multiple dependent LOVs from the same bind variable

Question

Hi all,
I'm having difficulty creating multiple dependent LOVs from queries based on the same bind variable in my JSF application (JDev 10.1.3.1). Basically I have a static LOV in a af:selectOneChoice component from which users select a value which then becomes the bind variable value for two separate queries that generate two different dependent LOV. Having developed the code along the lines of Steve Muench 's blog (http://radio.weblogs.com/0118231/2006/04/03.html#a685), the first dependent LOV works really well. The first dynamic LOV gets refreshed whenever the list from the static LOV changes, and I can execute other queries based on the values selected.
The problem arises when I want to create the second dynamic/dependent LOV that has the same bind variable based on the same selected value from the static LOV. Here I would also like the functionality whereby the second dynamic LOV is also refreshed after the selected value in the static LOV changes. Thinking that all I had to do was replicate the methodology used in creating the first dependent LOV, I created the second iterator, invokeAction and other binding components in the PageDef. The executable section now looks like the following:
<iterator id="SelectStaticQueryViewObjIterator"
              Binds="SelectStaticQueryViewObj" RangeSize="-1"
              DataControl="DMSApplicationModule1DataControl"/>
<invokeAction id="refreshDynamicQuery1BindParameter"
              Binds="ExecuteWithParams1" Refresh="prepareModel"
              RefreshCondition="#{empty requestScope.VariableChanged}"/>
<iterator id="SelectDynamicQuery1ViewObjIterator"
              Binds="SelectDynamicQuery1ViewObj" RangeSize="-1"
              DataControl="DMSApplicationModule1DataControl"/>
<invokeAction id="refreshDynamicQuery2BindParameter"
              Binds="ExecuteWithParams2" Refresh="prepareModel"
              RefreshCondition="#{empty requestScope.VariableChanged}"/>
<iterator id="SelectDynamicQuery2ViewObjIterator"
              Binds="SelectDynamicQuery2ViewObj" RangeSize="-1"
              DataControl="DMSApplicationModule1DataControl"/>I now have a problem whereby everytime I change the value of the static LOV, multiple HTML components for the same ADF component are being generated (the LOVs are refreshed via PPR). The surprising thing is that this duplicating behaviour applies to all ADF components listed after the first dynamic LOV in the *.jspx source. For example, I have a <af:outputText="Test Text"/> component created after the first dynamic LOV. Each time the value in the static LOV changes, a duplicate HTML component is created. This also applies to the 'related' second dynamic LOV which is bound to a af:selectOneChoice component - multiple dropdown lists are created. I've checked with the browser's Page Source and there are actually multiple html components being generated with their own unique ADF-generated IDs. I've tried all different options for the Referesh and RefreshCondition attibutes in the second invokeAction element but nothing seems to eliminate this issue.
Any suggestions about how I might create multiple dependent LOVs from the same bind variable that get refreshed when the selected value changes would be greatly appreciated.
Thanks
George

Answer 1

Hi all,
Just updating the thread on how I've overcome this issue. As it stood the manner in which I was trying to solve my use case, as described above, was creating an absolute mess. Then with a blank sheet of paper I quickly realised that a much simpler solution would be to create a whole series of master-detail VOs and build my components around them. Thankfully I haven't had any issues going down this path as yet.
Cheers
George