[Zope-dev] Re: Another mystery for you ;-)
Steve Alexander
steve@cat-box.net
Wed, 12 Jul 2000 12:22:37 +0100
Chris Withers wrote:
>
> I was trying to use 'if o in REQUEST.PARENTS' to expand branches on the
> way to the currently displayed object and was running into trouble which
> lead me to try out the following code:
>
> `REQUEST.PARENTS[0]`+`o`+`o==REQUEST.PARENTS[0]`+`o is
> REQUEST.PARENTS[0]`
>
> Now, this renders the following in the case where the branch _should_
> expand:
> <Folder instance at 88cbb30><Folder instance at 88cbb30>00
>
> What I don't understand is how two objects, apparently at the same
> memory location, return false from both 'object1==object2' and 'object1
> is object2'.
Smells like an Acquisition Wrapper misunderstanding :-)
http://www.zope.org/Members/michel/Projects/Interfaces/AcquisitionWrappedObject
Use the aq_self or aq_parent attribute to do your comparisons to get
your object out of its magic acquisition wrapper.
--
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net