[Zope-dev] Re: ZPatterns: __getitem__ on a DataSkin instance

[Steve Alexander]

Steve Alexander wrote:

> Let's say I have a DataSkin-derived ZClass that has the attribute 
> "forename" (in a dataskin attribute propertysheet).
> 
> If I get an instance of this ZClass from the ZODB (set up to use a 
> Folder w/ customizer suppport), I can refer to the "forename" attribute 
> using <dtml-var "this()['forename']">.
> 
> However, if I get an instance of the same class from a Specialist, 
> <dtml-var "this()['forename']"> gives me
> 
>    Error Type: AttributeError
>    Error Value: __getitem__
> 
> Any idea why there's the difference?
> 
> Can the latter case be fixed?

A workaround, using the ever-flexible skinscript:

I've defined __getitem__ through skinscript and a PythonScript.

SkinScript:
   WITH SELF COMPUTE __getitem__=getattr

PythonScript:
   parameter list: index

   return getattr(index)


-- 
Steve Alexander
Software Engineer
Cat-Box limited
http://www.cat-box.net