Hi Martin!
Martin Aspeli wrote:
I see that Yuppie has been experimenting with add forms. From what I can
tell, he's using a custom formlib base class and registering views as
e.g. addFile.html. It also look as if he's registering that view as an
action in portal_actions, in the 'folder' category.
That's correct. But I have to mention that not all parts of these
changes have reached the same stage of maturation. Using 'folder'
category Actions is a temporary hack to generate menu items for the new
add forms. I'm glad you want to help to find a better solution.
Plone currently supports add forms for the IAdding (+) view in a
somewhat ugly way (it looks to see if there's a view for IAdding with
the same name as the 'factory' set in the FTI of an addable type, and if
so, provides a link to it). IAdding can be a bit painful, so we're
interested in supporting an approach based on simple views.
Good.
It's also worth noting that z3c.form (via plone.z3cform, which should be
plain CMF compatible, though you may want a different default template)
has support for such views in quite a generic way. The CMF version of
that looks like this:
http://dev.plone.org/plone/browser/plone.z3cform/trunk/plone/z3cform/add.py
z3c.form is generally nicer to work with than formlib.
Maybe we should discuss this in a different thread. Here a short reply:
My code for the AddForm would look quite different, especially for CMF
trunk, but in general that's the way to go. Since z3c.form became the
standard in the Zope 3 world I'd like to see Zope 2 and CMF moving in
the same direction. Unfortunately using plone.z3cform is no option for
CMF because it has a different license and repository. *If* Plone wants
to donate that code to the Zope Foundation or someone writes something
similar (maybe five.z3cform), I'd be happy to help with CMF integration.
In any case, I'd like to know why you went down the portal_actions route
for rendering the add links. I'm not quite sure I like the idea of
having this be persistent configuration, separate to the FTI, as the two
would need to be kept in sync, and in sync with the view name registered
in ZCML.
CMF makes a distinction between portal types and content types. Portal
types are persistent wrappers around the non-persistent content types.
You can define many different portal types based on one content type.
In CMF you add *portal type* instances, so the 'add' links should be
persistent as well. The non-persistent add form has to take the portal
type name as argument to create the correct portal type.
I'm not sure what the right solution is, but I guess extending the type
info classes will be the best approach.
Also, why not try to use the Zope 3 menu concept? There's even a special
add menu directive.
Moving away from persistent actions is not on my todo list. And as I
tried to explain above, the current portal type concept depends on
persistent actions.
I'd quite like to find a good approach here that can be used by both
Plone and plain CMF, if possible.
I hope you find one ;)
Cheers,
Yuppie
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