[Zope-CMF] Re: [dev] newstyle content creation

[Charlie Clark]

Am 19.05.2008 um 18:51 schrieb Charlie Clark:

> That's probably the easiest solution at the moment although it would  
> be nice to be able to declare this in the schema. I suppose two  
> different interfaces à la IObject and IMutableObject provide a way.  
> I find fiddling with the form fields too easy to mess up! I think  
> the only thing that's missing from this is a nicer way of getting  
> the portal_type. As this is configurable in the ZMI and perfectly  
> possible to have several types deriving from the same class and,  
> therefore, from the same interface. Although as with browser views  
> this should no longer be possible. I can't see an easy way of doing  
> this but it seems to me much more natural to do this in the  
> interface rather than in the view as it's essentially declarative  
> work. Maybe a dedicated schema field for CMF Types and associated  
> hidden widget?
>
> portal_type = CMFDefault.schema.ContentType(title=u"portal type")


Obviously that won't work but it seems it should be possible to add  
the portal_type logic to the base form as this should be true for all  
add forms for CMF objects, shouldn't it?

in ContentAddFormBase

     def setUpWidgets(self, ignore_request=False):
         super(ContentAddFormBase,
               self).setUpWidgets(ignore_request=ignore_request)
         self.widgets['portal_type'].hide = True

     def form_fields(self):
         fields = form.FormFields(
                 TextLine(
                     __name__='portal_type',
                     default=self.portal_type)
                     )
         return fields

add forms now simply need to define their portal_type and extend the  
fields:

     portal_type = u"Textbody"

     @property
     def form_fields(self):
         fields = (super(TextAdd, self).form_fields() +  
form.FormFields(ITextbody))
         return fields

I'm not sure if it's good style to do this using properties but it  
seems to work for and I find it less of a source of copy and paste  
errors.

Charlie
--
Charlie Clark
Helmholtzstr. 20
Düsseldorf
D- 40215
Tel: +49-211-938-5360
GSM: +49-178-782-6226