Hi again,
>> If there is a bug in the container framework my assumption would be
>> that that the following part of code causes your problem. The regular
>> container asserts IContained either by the directlyProvides mechanism
>> if the item provides ILocation or else by a ContainedProxy.
>>
>> zope.app.container.contained line 325:
>> [...]
>>if not IContained.providedBy(object):
>>if ILocation.providedBy(object):
>>zope.interface.directlyProvides(
>>object, IContained,
>>zope.interface.directlyProvidedBy(object))
>>else:
>>object = ContainedProxy(object)
>> [...]
>>
[...]
>
well... I'm not sure but it seems not to be a bug in ContainedProxy, but
just a "display bug" in the @@introspector.html...
I couldn't trace into the ContainedProxy, but put some debug messages and
got something interesting
I put this code in a pacage called "dprovide"
###
### dprovide/__init__.py
from zope import interface
from zope import schema
from zope.formlib import form
from zope.app.file import File
from zope.app.folder import Folder
from zope.location import ILocation
class IMarker(interface.Interface):
""" test marker interface for directlyProvides """
class ITestSchema(interface.Interface):
""" test schema for directlyprovides """
file = schema.Bool(
title = u'Create File and directlyProvide IMarker' )
file2= schema.Bool(
title = u'Create File and directlyProvide ILocation and IMarker' )
folder = schema.Bool(
title = u'Create Folder and directlyProvide IMarker' )
class DirectlyProvidesTest(form.AddForm):
form_fields = form.Fields( ITestSchema )
def create( self, data ):
r = {}
if data['file']:
f = File()
interface.directlyProvides( f, IMarker )
r['file'] = f
if not IMarker.providedBy( r['file'] ):
raise Error
if data['file2']:
f = File()
f.__name__ = ''
f.__parent__ = ''
interface.directlyProvides( f, ILocation, IMarker )
r['file2'] = f
if not IMarker.providedBy( r['file2'] ):
raise Error
if data['folder']:
f = Folder()
interface.directlyProvides(f, IMarker)
r['folder'] = f
if not IMarker.providedBy( r['folder'] ):
raise Error
return r
def add( self, r ):
if r.has_key('file'):
self.context.add( r['file'] )
if r.has_key('file2'):
self.context.add( r['file2'] )
if r.has_key('folder'):
self.context.add( r['folder'] )
self._finished_add = True
###
and in dprovide/configure.zcml
and I "patched" zope.app.container.contained @ 325 to look like this:
if not IContained.providedBy(object):
if ILocation.providedBy(object):
zope.interface.directlyProvides(
object, IContained,
zope.interface.directlyProvidedBy(object))
else:
print_provides = False
if object.__class__.__name__ == 'File' or\
object.__class__.__name__ == 'Folder':
from dprovide import IMarker
print "! BEFORE ContainedProxy: ",
object.__provides__
print " IMarker.providedBy = ",
IMarker.providedBy(object)
print_provides = True
object = ContainedProxy(object)
if print_provides:
print "### AFTER ContainedProxy: ",
object.__provides__
print " IMarker.providedBy = ", IMarker.providedBy(object)
###
now.. after adding a File (without) ILocation, I see the output
! BEFORE ContainedProxy:
IMarker.providedBy = True
### AFTER ContainedProxy:
IMarker.providedBy = True
so, the IMarker is provided by the file, but in a "different" way.. so I
think the introspector is just not showing it correctly...
if I add a File w/ ILocation, it doesnt go into the ContainedProxy and the
introspector shows the directlyProvided intefaces correctly...
regards.
luis
ps. if you want to try that... you have to add the files "one by one".. if
you select two checkboxes at once you get a "dupplicate names" error.. not
sure why.
___
Zope3-dev mailing list
Zope3-dev@zope.org
Unsub: http://mail.zope.org/mailman/options/zope3-dev/archive%40mail-archive.com
