40 lines
1.4 KiB
Python
40 lines
1.4 KiB
Python
"""Implement the ++comments++ traversal namespace. This should return the
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IDiscussion container for the context, from which traversal will continue
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into an actual comment object.
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"""
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from plone.app.discussion.interfaces import IConversation
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from zope.component import adapts
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from zope.component import queryAdapter
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from zope.interface import implements
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from zope.interface import Interface
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from zope.publisher.interfaces.browser import IBrowserRequest
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from zope.traversing.interfaces import ITraversable
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from zope.traversing.interfaces import TraversalError
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class ConversationNamespace(object):
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"""Allow traversal into a conversation via a ++conversation++name
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namespace. The name is the name of an adapter from context to
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IConversation. The special name 'default' will be taken as the default
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(unnamed) adapter. This is to work around a bug in OFS.Traversable which
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does not allow traversal to namespaces with an empty string name.
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"""
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implements(ITraversable)
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adapts(Interface, IBrowserRequest)
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def __init__(self, context, request=None):
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self.context = context
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self.request = request
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def traverse(self, name, ignore):
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if name == "default":
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name = u""
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conversation = queryAdapter(self.context, IConversation, name=name)
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if conversation is None:
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raise TraversalError(name) # pragma: no cover
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return conversation
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