[Zope] dtml-if fustration!

[Michael]

This statement will check to see if SelectSID contains a value, if true, it 
will set the value, if false, it will not.  I'm not really sure of what 
you're trying to do with [ SelectSID = <dtml-var SelectSID> ]

<dtml-if expr="selectSID">
<dtml-call "REQUEST.set('SelectSID',SelectSID)">
</dtml-if>


Michael

On Saturday 24 August 2002 10:56 am, Greg Conway wrote:
> Hi all,
>
> I have a fustrating problem with dtml-if's!! I've tried to work round it in
> many ways, but there is probably an easy one I am overlooking knowing my
> luck...
>
> Anyway... Consider the following dtml-if statement:
>
>     <dtml-if SelectSID>
>       SelectSID = <dtml-var SelectSID>
>       <dtml-call "REQUEST.set('SelectSID', SelectSID)">
>     </dtml-if>
>
> This works okay, and stores the variable SelectSID in the request for the
> code to pick up again on it's next pass.
>
> However, on the next pass, the variable SelectSID doesn't exist! As the
> variable is now REQUEST.SelectSID - and the following code doesn't work....
>
>     <dtml-if "REQUEST.SelectSID">
>       SelectSID = <dtml-var SelectSID>
>       <dtml-call "REQUEST.set('SelectSID', REQUEST.SelectSID)">
>     </dtml-if>
>
> ...as an error is thrown up if REQUEST.SelectSID doesn't exist!
>
> Anybody got a simple answer to my dilemma?!!
>
> Many thanks for any help!
>
> Regards,
>
> Greg Conway.
>
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