Re: [Zope] How do I check for existence of a page?

On Wed, 28 Feb 2001, Dieter Maurer wrote:

You should not use a "dtml-in" to check for the existence of an object. You should directly check for the object:

I many cases, you can use

<dtml-if "_.hasattr(aq_explicit,'attrname')">

or

<dtml-if "_.hasattr(object.aq_explicit,'attrname')">

to check whether the current object or "object", respectively, has attribute "attrname".

In some rare cases, this can give you a "true" result, even though the object does not have an 'attrname'.

To help me understand Zope better (!), what are the 'rare cases' where this would give a false positive? Thanks for the help. -- Joel Burton <jburton@scw.org> Director of Information Systems, Support Center of Washington