[Zope] Re: [Zope-dev] Need for "aq_base" in DTML(was: Re: [Zope] Dumb DTML question - existance check of an object)(was: Re: [Zope] Dumb DTML question - existance check of an object) question - existance check of an object)(was: Re: [Zope] Dumb DTML question - existance check of an object)

Dieter Maurer wrote:

* Access to "/": "PARENTS[-1]" * Existence check: "_.hasattr(object,what)" NOTE, that this is the sloppy part.

- "_.hasattr" will return true, if "object" has attribute "what" (that is what we want) *OR* when it has acquired such an attribute (we do *NOT* want that here).

What we would need is a DTML accessible version of "aq_base". This is trivially handled by an external method.

Can you do this with the following in DTML? <dtml-with "PARENTS[-1]" only> <dtml-if "_.hasattr(object, what)"> ...stuff... </dtml-if> </dtml-with> Not tested, but it looks right to me. -- Steve Alexander Software Engineer Cat-Box limited http://www.cat-box.net