[Zope-CMF] problems w/ 'File' type in CMF 1.6

[Rob Miller]

howdy,

in trying to get Plone working against the 1.6 branch i've come across 
some problems w/ the way that CMFDefault.File.File is working since the 
base classes have been reordered.

the biggest problem has to do w/ the default view lookup.  when 
OFS.Image.File was the first base class, then that class's index_html 
method would be used as the default view.  with PortalContent first, 
however, index_html is None.  this causes ZPublisher to use __call__, 
but this then calls queryMethodId('(Default)') on the FTI, which returns 
index_html, which is still None.  when i add CMF File objects in a Plone 
site and try to browse to them, i'm getting 404s; in a pure CMF site i 
get a notice that 'index_html' has an empty or missing docstring.

the other problem, not as big an issue, has to do with the comment that 
is immediately after the File class definition; it explicitly says that 
the base classes should not be reordered b/c this would cover up the 
id() method in the OFS.Image.File class.  using getId() will always 
work, of course, and i'm not even sure that covering the id() method 
will actually break anything, but it probably deserves a little bit of 
investigation and, if all is well, we should remove the misleading comment.

i'd dig deeper into this myself, but it's late and my bed is calling...

-r