[Zope] dtml syntax help

[Sean Kelley]

Great, the last "polluted" choice works well.  I really do need to spend 
some time with ZPT.
Thanks for the quick and functional response now.
Sean

Chris Withers wrote:

> Sean Kelley wrote:
>
>> Hi
>> I need help with dtml syntax...
>
>
> ...learn ZPT ;-)
>
>> I have the following line before a dtml-in on a catalog:
>> <dtml-call "REQUEST.set('Verified','on')">
>> I want to be able to list only items where Verified is not set to 
>> 'on'  The default value of verified is no value at all.  If I say:
>> <dtml-call "REQUEST.set('Verified','')">
>> (empty value)  I get everything. How does one say Verified = to NOT 
>> 'on' in dtml?
>
>
> This has nothing to do with DTML, it is a catalog question.
> If 'Verified' can either be '' or 'on', then your search can be 
> achieved with:
>
> your_catalog(Verified=('',))
> ...or:
> REQUEST.set('Verified',('',))
> ...but I don't like seeing that. Doing that polutes the REQUEST and is 
> rarely necessary or a good idea.
>
> cheers,
>
> Chris
>
>