I'd like to propose to merge the philikon-aq branch into Zope trunk aka
For those unfamiliar with the branch, it makes Acquisition aware of
__parent__ pointers. This makes it unnecessary to use Acquisition
mixin's for Zope 3 code to use them in Zope 2 code. The security
machinery of Zope 2 will still be able to work as expected.
All tests in the Zope itself pass. New tests have been written for all
edge cases found during the development of the branch.
As a real world exposure Plone has been used to test the branch. All
tests in Plone except one edge-case of a monkey-patch loaded package
still pass. Plone in current versions make heavy use of Zope 3 and Five
technologies inside Zope 2, so I see this as a very good indicator for
the readiness of the branch. The one edge-case is something which needs
to be fixed in Plone, as it doesn't make use of any official API.
Using Zope 3 code inside Zope 2 has lead to various 'inventive
solutions' to work around problems. Some of these have not used official
API's. It is possible that some of those might need to be adjusted.
Adjusting them should be straight forward in most cases and mostly
consist of removing the hackish workarounds.
The second problem that might arise, is that the implicit assumption
that every object inside Zope 2 inherits from Acquisition base classes
no longer holds. Code that relies on the various aq_* attributes to be
there need to be adjusted to use the Acquisition methods instead. This
change is trivial to do and doesn't need to be done at first. It only
needs to be done when you want to allow direct Zope 3 code in your
application. As part of the branch all code in Zope 2 itself have been
adjusted to use the aq_* methods.
I would like to do the merge as soon as possible, so people can easily
test it against all their applications and report back problems.
Merging it into Zope trunk will get it into the Zope 2.12 release which
is at this point not scheduled yet, but is unlikely to get a release
before early 2009. This should give us plenty of time to test.
P.S. Thanks to philiKON for doing most of the work on this branch :)
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