[web2py] Condition in view weird behaviour

[Annet]

In a view I have the following code:

<div class="span4 box box-pad radius-small">
  {{if session.cal.lesrooster or session.cal.event_list or 
session.cal.cursusrooster:}}
    {{include 'site/calendar.html'}}
  {{pass}}
  {{include 'site/promoUnit.html'}}
 </div> <!-- /span -->

Despite session.cal.lesrooster, session.cal.event_list and 
session.cal.cursusrooster being False, site/calendar.html is being 
included. When I replace {{include 'site/calendar.html'}} with <p>text</p> 
the text isn't displayed.

When I move the condition to site/calendar.html, the behaviour is the same, 
only when I have the condition both in the view and in site/calendar.html 
the page is rendered correctly.

site/index.html:

<div class="span4 box box-pad radius-small">
  {{if session.cal.lesrooster or session.cal.event_list or 
session.cal.cursusrooster:}}
    {{include 'site/calendar.html'}}
  {{pass}}
  {{include 'site/promoUnit.html'}}
 </div> <!-- /span -->

site/calendar.html:

{{if (session.cal.lesrooster or session.cal.event_list or 
session.cal.cursusrooster):}}
  <ul class="nav nav-tabs">
    ...
  </ul>
 
  <div class="tab-content">
    ...
  </div> <!-- /tab-content -->

  <script type="text/javascript">
   ...
  </script>
{{pass}}


Is there an explanation for this behaviour?


Kind regards,

Annet