[Zope] Batchprocessing with multiple conditions?

[Peter Arvidsson]

I have objects of a certain meta-type. They have some properties and one
of the properties is a boolean. How do I make a dtml-in loop among those
objects with the boolean set to yes? I dont want it to traverse any
other value at all only those that match the condition should be
included in the sequenze because I am doing batchprocessing like in
figure 6 of
http://www.zope.org/Documentation/Guides/DTML-HTML/DTML.7.5.html. I have
done like this now:

<dtml-if "objectValues(['Meta type'])">

    <table width="600" border="0" vspace="0" hspace="0" cellpadding="0">


     <dtml-in "objectValues(['Meta type'])" sort=date,submittedDate,id
reverse previous size=batchSize orphan=0 skip_unauthorized
start=startNumber>
        <tr>
          <td colspan="2" class="common2">
            <p><b><a href="viewNewsTrigger<dtml-var
sequence-query>startNumber=<dtml-var previous-sequence-start-number>">
            (Previous <dtml-var previous-sequence-size>)</a></b></p>
          </td>
        </tr>
      </dtml-in>

      <dtml-in "objectValues(['Meta type'])" sort=date,submittedDate,id
reverse size=batchSize orphan=0 skip_unauthorized start=startNumber>
      <dtml-if BOOLEAN>
        <tr>
          <td colspan="2" class="common1">
            <p><dtml-var date fmt="%Y-%m-%d">&nbsp;
            <font size="2"><b><a
href="viewSelectedNews?entry=&dtml-id;">&quot;&dtml-header;&quot;</a></b></font></p>

          </td>
        </tr>
      </dtml-if>
      </dtml-in>

      <dtml-in "objectValues(['Meta type'])" sort=date,submittedDate,id
reverse next size=batchSize orphan=0 skip_unauthorized
start=startNumber>
        <tr>
          <td colspan="2" class="common2">
            <p><b><a href="viewNewsTrigger<dtml-var
sequence-query>startNumber=<dtml-var next-sequence-start-number>">
            (Next <dtml-var next-sequence-size>)</a></b></p>
          </td>
        </tr>
      </dtml-in>

    </TABLE>

  </dtml-if>

This shows only the objects I want to show but the sequences is counted
wrong because even though it doesn't show the objects with BOOLEAN=false
they are still counted in the dtml-in.

How can I loop only the objects I want to loop?

Peter