[Zope] How can a method know if it was acquired?

[Stuart Bishop]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1


On Monday, July 7, 2003, at 08:00  PM, Itai Tavor wrote:

> I got a folderish python product with the following method:
>
>     def SKU(self):
>         """ Return our SKU for the catalog """
>         return self.sku
>
> The problem is that when objects contained in instances of this 
> product are cataloged, they acquire the SKU method, so they also get 
> the sku property. That is bad. So what I need is something like this:
>
>     def SKU(self):
>         """ Return our SKU for the catalog """
>         if (I was acquired):
>             return None
>         else:
>             return self.sku
>
> But I can't figure out how to do that. Help?

Try this:

from Aquisition import aq_explicit
[...]
     def SKU(self):
         'return SKU if we really have one, and not just aquired one'
         try:
	        return aq_explicit(self).sku
         except AttributeError:
             return None

or...

     def SKU(self)
         'return SKU if we really have one'
         if hasattr(aq_explicit(self),'SKU'):
             return self.sky
         else:
             return None

You can also catalog the meta_type of the object, and use that in the
query.


- -- 
Stuart Bishop <zen@shangri-la.dropbear.id.au>
http://shangri-la.dropbear.id.au/

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.1 (Darwin)

iD8DBQE/CmGHh8iUz1x5geARAlkpAKDyCx9h13/+/Dxzh13fwm+/H+6+zQCggC86
GkhQC5xCIjZcTZp/hue4dZo=
=1UvW
-----END PGP SIGNATURE-----