[Zope3-Users] Custom addform and object creation error

[Cliff Ford]

I have a custom addform that works fine with a standard configuration. 
However, on submission it redirects to the contents view of its 
container and I want it to redirect somewhere else, such as the new 
object's edit or metadata views. All I really need is a nextURL 
configuration directive, mentioned in mailings some time ago, but I 
don't think that has been implemented.

I have created a class with a __call__ method that returns the custom 
form template, and a nextURL() method. In the configuration file I have 
replaced the content_factory directive with the class directive.

With the custom form and class, the form displays and field validation 
still works, but with valid fields I get an object creation error:

File "/usr/local/Zope3/src/zope/app/form/browser/add.py", line 71, in create
     return self._factory(*args, **kw)
TypeError: 'NoneType' object is not callable

I have looked at the add.py module and am none the wiser. I guess I have 
neglected to set something somewhere, may be context related. Can anyone 
enlighten me? The custom class has almost nothing in it (see below) so I 
am surprised it gets as far as it does. [I have also searched the 
archives and read both recent Zope3 books but can't find an answer.]

Cliff

Custom class:

from zope.app.pagetemplate.viewpagetemplatefile import ViewPageTemplateFile

class PageAddFormD:
     """This class reads the form data and creates a custom Page"""

     template = ViewPageTemplateFile('pageaddformd.pt')

     def __call__(self):
         return self.template()

     def getInterfaces(self):
         """ Don't know if I need this here """
         return implementedBy(GlgPage)

     def nextURL(self):
         """ return the next place to go """
         # have not got this far yet
         return '../'