[Zope-dev] Why is ZEvent not ZClass subclassable?

[Jeff K. Hoffman]

On Tue, 7 Mar 2000, Loren Stafford wrote:

> I still haven't found an answer to this question. Anyone have any idea why
> or how to figure out?

[snip]

> class BaseZEvent(CatalogAware, DTMLMethod):
>   meta_type = 'ZEvent'
>   default_catalog = ScheduleID
> 
>   def __init__(self, id, title = '', file = ''):
>     DTMLMethod.__init__(self, file, __name__ = id)
> 
>   manage_options=({'label':'Edit', 'action':'manage_main'},
>                   {'label':'Upload', 'action':'manage_uploadForm'},
>                   {'label':'View', 'action':''},
>                   {'label':'Proxy', 'action':'manage_proxyForm'},
>                   {'label':'Security', 'action':'manage_access'},
>                  )
>   __ac_permissions__=(
>     ('View management screens', (
>         'manage_editForm', 'manage', 'manage_main', 'manage_uploadForm',
>         'document_src', 'PrincipiaSearchSource')),
>     ('Change DTML Methods', ('manage_edit', 'manage_upload', 'PUT')),
>     ('Change proxy roles', ('manage_proxyForm', 'manage_proxy')),
>     ('View', ('__call__', '')),
>     ('FTP access', ('manage_FTPstat','manage_FTPget','manage_FTPlist')),
>   )
> 
>   manage_editForm=HTMLFile('documentEdit', globals())
>   manage=manage_main=manage_editDocument=manage_editForm
> 
> class OneTimeZEvent(BaseZEvent):
>   #meta_type = 'Onetime ZEvent'
> 
> default__class_init__(OneTimeZEvent)
> 
> # code that registers above class
>       context.registerClass(
>         ZEvent.OneTimeZEvent,
>         permission = 'Add ZEvent',
>         constructors = (
>           ZEvent.manage_addOneTimeZEventForm,
>           ZEvent.manage_addOneTimeZEvent),
>         icon = 'www/OneTimeZEvent.gif')

Unless my eyes just aren't seeing something, you are missing a call to
registerBaseClass.

In the __init__.py for your Product, put:

import BaseZEvent

def initialize(context):
  context.registerBaseClass(BaseZEvent.BaseZEvent,
                            BaseZEvent.BaseZEvent.meta_type)

Note that registerClass is NOT the same as registerBaseClass.

--Jeff

---
Jeff K. Hoffman                                         704.849.0731 x108
Chief Technology Officer                                mailto:jeff@goingv.com
Going Virtual, L.L.C.                                   http://www.goingv.com/