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

1 Mar 2001


      Joel Burton writes:
...
On Wed, 28 Feb 2001, Dieter Maurer wrote:
...
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?
That is difficult to explain.
Search the (searchable) list archive for a post from
me titled "unexpected acquisition behavior" (or something similar).


Dieter