Ajax Update of a rich:subTable with rich:dataTable

Question

Hello,
i just want to rerender a subtable within a dataTable via ajax request.
The concrete requirement is just to model a 1-level table tree, such that i am
able to expand items in the superior table. I have tried different solutions.
One is, that value.items returns an empty list on not expanded,
other was to use the rendered attribute at the subtable and/or also
at a wrapping columngroup.
Another thing is, that the table obviously requests the
ajaxKeys attribute at the dataTable, it also returned
the correkt rows (as integer index keys within a Set),
but the subtable is never refreshed.
I have no more idea! Do i only have the possibility
to update the whole table (this works fine) ?
When do i really need the ajaxKeys attribute?
My third question by this way is, is there a nice
way of doing it using pure client side javascript effects?
Hope you can help,
Ijaja
<rich:dataTable      value="#{bean.list}" var="value" id="table">
     <rich:column colspan="2">
          <a4j:commandLink action="#{value.switchExpanded()}" reRender="subtable">
               <h:graphicImage id="expandimage" value="#{value.image}"/>
          </a4j:commandLink>
          <h:outputText value="Text"/>
     </rich:column>
     <rich:subTable id="subtable" value="#{value.items}" var="item">
          <rich:column>
               <h:outputText value="#{item.label1}" />
          </rich:column>
          <rich:column>
               <h:outputText value="#{item.label2}" />
          </rich:column>
     </rich:subTable>
</rich:dataTable>

Answer 1

Hi, thanks for your reply. I looked at the ajax code in that post.
attrResponse should be called from my Action class (controller class in my case since am using spring)
However, this is extremely useful if I am expecting the user to do an input for me.
I need to figure out if a Query is updating table abc ( I plan to do it this way :
I will get the table name from all update queries being executed (this I dont know how I will do though), and then after the successfull updation I will execute the select query for the same table) and then return the result set in the attrResponse.
ultimately this will help in updating rows displayed in jsp based on updates done to the database without the page being refreshed. For ex, if my current Jsp is displaying my total no. of employees, which is 2 then if someone updates the table with a third employee, then the third row gets automatically updated.
am I taking it up in the correct way ?
Is there another way to do this ?
Thanks for your time on this.