EL value inconsistent (or I'm losing it!)

[davesb]

Hi all - I'm tearing my hair out over this one and I'm just hoping for a sanity check...

I have a simple page which includes (using ui:include) another dynamically, based on the content of a variable - here's the XHTML;

<div id="filterOptions">
  <rich:dataTable width="100%" value="#{editFilter.filterChoices}" var="filterChoice">
    <rich:column>
      #{filterChoice.filter.operator == null ? 'NONE' : filterChoice.filter.operator}
    </rich:column>
    <rich:column>
      <ui:include src="operators/#{filterChoice.filter.operator == null ? 'NONE' : filterChoice.filter.operator}.xhtml">
        <ui:param name="filter" value="#{filterChoice.filter}" />
        <ui:param name="attribute" value="#{editFilter.selectedAttribute}" />
      </ui:include>
    </rich:column>
  </rich:dataTable>
</div>

When this page is rendered, the first column displays the correct value (e.g. EQUALS) but the ui:include always includes 'operators/NONE.xhtml'. I've looked over this so many times (sometimes out of the corner of my eye, just in case) but I can't see why filterChoice.filter.operator always resolves to the correct string in the first column and null in the second.

Can anyone spot anything?

[davesb]

I'm using Seam 2.0.2 SP1 btw

[david.david.johansson.redpill.se]

Hi,

the problem is that ui:include is evaluated when the JSF tree is built, but rich:dataTable is evaluated at rendering.

Check out build-time-vs-render-time
for a more thorough explanation. Look at the bottom of that page for a link to another good explanation.

[swd847]

You could maybe try a4j:include instead, but I am not sure if it is any different.

[davesb]

Yes, that was the problem - so I've had to replace the rich:dataTable with a c:forEach for now (and done all the pretty styling manually). a4j:include acts in the same way as ui:include (at least for the version I'm using).

So, problem solved - kind of. I'm still looking for a cleaner way of doing this at render time so that I can use a dataTable for all the formatting and paging etc.

Thanks