Re: [Zope] Testing multiple values for existance - still

Oliver Sturm writes:

I recently had the following question:

...

I can do <dtml-if foo> to test if foo is known at all. Why can't I do <dtml-if "foo or bar"> to test if either foo or bar are known? I get a "Name Error" saying something like "global name 'foo' is not defined" if I do this (and foo is actually undefined). Is there a different syntax for this?

which was answered quickly by marc lindahl <marc@bowery.com> with

...

Try testing for existence first -- hasattr()

and by Steve Drees <drees@rangebroadband.com> with

...

<dtml-if "REQUEST.has_key('foo') or REQUEST.has_key('bar')"> Apparently, you ignored my reply.....

<dtml-if "(_.has_key('foo') and foo) or (_.has_key('bar') and bar)"> Dieter