Re: Null values with fd:assert

[Daniel Curran]

Thanks, that documentation and that sample expression was just what I 
needed to tackle my problem.

Dan
Simone Gianni wrote:
Hi Daniel,
something like this should do the trick :

      <fd:assert test="And(Not(IsNull(startdate)), enddate &gt;
startdate)">

Or something similar. These are currently daisy expressions, you can
read more about them here :
http://cocoondev.org/xreporter/docs/core/exprlang.html . IsNull is an
expression added to the xreporter language by cocoon forms to do exactly
this kind of tricks.

Hope this helps,
Simone


Daniel Curran wrote:

  
I have two dates defined as:

<fd:field id="startdate">
   <fd:label>Start Date</fd:label>
   <fd:datatype base="date">
      <fd:convertor type="formatting">
         <fd:patterns>
            <fd:pattern>MM/dd/yyyy</fd:pattern>
         </fd:patterns>
      </fd:convertor>
   </fd:datatype>
</fd:field>

<fd:field id="enddate">
   <fd:label>End Date</fd:label>
   <fd:datatype base="date">
      <fd:convertor type="formatting">
         <fd:patterns>
            <fd:pattern>MM/dd/yyyy</fd:pattern>
         </fd:patterns>
      </fd:convertor>
   </fd:datatype>
   <fd:validation>
      <fd:assert test="enddate &gt; startdate">
         <fd:failmessage>End date must be greater than the Start
date</fd:failmessage>
      </fd:assert>
   </fd:validation>
</fd:field>

When I set an end date, but leave the start date null I get an error
_Error evaluating expression on assert validation rule._

I would like the test to pass if either or both fields values are null.

Does anyone know how this would be accomplished? I am also interested
in documentation of the types of rules that can be used, where should
I look for this?

Thanks,
Dan Curran


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