[Zope] dtml-if fustration!

[Greg Conway]

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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