On Mon, 09 Feb 2004 21:48:29 +0100 Santi Camps <[EMAIL PROTECTED]> wrote:
> Hi all, > > I know that adaptors are introduced in zope3 but, anybody knows if > this technique can be used in zope2 ? Adapters are a general pattern. Zope 3 has infrastructure (component architecture and ZCML) that automates registering and using them, but the general pattern can certainly be applied to Zope 2 without it. Just create a class which defines the methods you want, and accepts a folder in its constructor. When you want to use the adapter, instantiate the class around the folder. > I've been trying to add some extra functionallity to a Folder object > without inheriting, but I'm not able to make it work. To maintain the > adapted object publishable I've rewrited __getattr__, but then some > extra problems appears. __getattr__ hooks are notoriously tricky to get right, especially for Zope due to acquisition and especially for folders. > Anybody knows if there is a way to use adapters in zope2 ? Or, if > not, there is some other way to add functionallity on-the-fly, without > inheriting ? Zope2 folders are designed for this. They are really just "blank objects" where you can specify your own methods in instance space. Traditionally in Zope2, there are two ways to do this: by adding "method" objects (External Methods, DTML methods, python scripts, ZPT) directly to the folder. Or by adding these objects "above" the folders and aquiring them which is a type of environmental inheritance. In the CMF this is codified in the skins tool which contains global methods which can be applied to basically any object in the site. hth, -Casey _______________________________________________ Zope-Dev maillist - [EMAIL PROTECTED] http://mail.zope.org/mailman/listinfo/zope-dev ** No cross posts or HTML encoding! ** (Related lists - http://mail.zope.org/mailman/listinfo/zope-announce http://mail.zope.org/mailman/listinfo/zope )
