Richard Jones writes:
> As the subject says, REQUEST.set('n', n+1) is broken on zope.org. The
> following DTML will raise an AttributeError on __add__:
> <dtml-call REQUEST.set('n', 1)>
> <dtml-call REQUEST.set('n', n+1)>
There may be a simple explanation
(someone else already pointed out, that you need to use "...";
I expect, you did as otherwise, you would get a "KeyError"):
There may be an object named "n" somewhere in the
acquisition context. An object that does not define
an "__add__" method.
As you probably know (or can reread in the documentation),
"REQUEST" has quite a low priority for lookups
(in fact, it is at the bottom of the acquisition context).
It is therefore easy to have a REQUEST definition overridden.
Use "REQUEST['n']+1" instead of "n+1".
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