I've come across an error on trying to add a Specialist.

Zope 2.2b4, ZPatterns latest release (ZPatterns-0-4-0a1).

Go to the zope management pages, as a Manager.
Choose to add a Specialist.
Leave the "Create Default Rack of type" drop-down set to "Rack".
Put in an appropiate id, such as "test".
Press "Add".

We get a Zope error:

  Error Type: TypeError
  Error Value: keyword parameter redefined

Traceback (innermost last):
  File /usr/local/zope/SiteBox/lib/python/ZPublisher/Publish.py, line
222, in publish_module
  File /usr/local/zope/SiteBox/lib/python/ZPublisher/Publish.py, line
187, in publish
  File /usr/local/zope/SiteBox/lib/python/Zope/__init__.py, line 221, in
  File /usr/local/zope/SiteBox/lib/python/ZPublisher/Publish.py, line
171, in publish
  File /usr/local/zope/SiteBox/lib/python/ZPublisher/mapply.py, line
160, in mapply
    (Object: manage_addSpecialist)
  File /usr/local/zope/SiteBox/lib/python/ZPublisher/Publish.py, line
112, in call_object
    (Object: manage_addSpecialist)
line 71, in manage_addSpecialist
  File /usr/local/zope/SiteBox/lib/python/Products/ZPatterns/PlugIns.py,
line 436, in _constructPlugIn
TypeError: (see above)

The error occurs because the _constructPlugIn() method of PlugIns.py
attempts to give "id" to manage_addRack as a keyword argument, whereas
it has already been given the id as a positional argument. Actually, I
think what it is being given as an id is wrong too :-)

The offending line is 436:
  return apply(getattr(product, method), (product,)+args, kwargs)

The rest of this is mainly for my benefit, and will be obvious to anyone
familiar with the code :-)

"getattr(product, method)" evaluates to the python method
manage_addRack, and it appears to be a bound method.

"product" is a __FactoryDispatcher__ instance.

"args" is None, or ().

"kwargs" is {'id': 'defaultRack'}.

The signature of manage_addRack() is:

  def manage_addRack(self, id, title='', REQUEST=None):

and is effectively getting called as:

  instance.manage_addRack(some __FactoryDispatcher__, id='defaultRack')

I'm not sure whether the method intended to get an unbound method rather
than a bound one, or whether "id" needs special handling here.

Steve Alexander
Software Engineer
Cat-Box limited

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