[Zope] - can't __call__ objects?

[Jim Fulton]

Andreas Kostyrka wrote:
> 
> On Fri, 18 Dec 1998, Amos Latteier wrote:
> 
> > Bobo^H^H^H^HZPublisher call's an object's 'index_html' method, if no method
> > is specified.
> >
> > So if you want your __call__ method to be considered the default published
> > method here's how to do it:
> >
> > class CallMe:
> >   "defines __call__ as the default publishing method"
> >
> >   def __call__(self):
> >     "call the object"
> >     ...
> >
> >   index_html=__call__
> That's not really desirable many times, as one'd like the DocumentTemplate
> behaviour of calling an object with self==containing folder.
> Additionally index_html is called with the wrong idea of location:
> .../test.gif
> is interpreted as the URL
> .../test.gif/index_html

Right.  In particular the base href gets set to .../test.gif, 
not .../

> For this to work, one has to add the parameter/default values to the
> object to emulate a real callable object. It seems probable that you can
> even have any parameter combination, including RESPONSE, which would allow
> images to be pseudo methods too :)

Exactly.  ZPublisher won't call something unless it smells like a function
(or method).  In particular, it can't marshal parameters unless it
hase some function meta-data telling it how.  Now, I suppose that if
an object has a __call__ method, it could get the meta-data from that.
Hm.  I wonder why it doesn't do that.  I must have had a good
reason. ;) Maybe this should change.

Jim

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