def test_get_set_ProxiedObject(self):
from zope.container.contained import getProxiedObject
from zope.container.contained import setProxiedObject
proxy = ContainedProxy(self)
self.assertIs(self, getProxiedObject(proxy))
o = object()
self.assertIs(o, getProxiedObject(o))
old = setProxiedObject(proxy, o)
self.assertIs(self, old)
self.assertIs(o, getProxiedObject(proxy))
with self.assertRaises(TypeError):
setProxiedObject(self, 1)
def unrelateOnDeletion(event):
"""Remove all relationships when an object is deleted."""
if not IObjectRemovedEvent.providedBy(event):
return
linkset = IRelationshipLinks(event.object, None)
if linkset is not None:
# event.object may be a ContainedProxy
unrelateAll(getProxiedObject(event.object))
def unrelateOnCopy(event):
"""Remove all relationships when an object is copied."""
if not IObjectCopiedEvent.providedBy(event):
return
# event.object may be a ContainedProxy
obj = getProxiedObject(event.object)
linkset = IRelationshipLinks(obj, None)
if linkset is not None:
links_to_remove = []
for link in linkset:
other_linkset = IRelationshipLinks(link.target)
try:
other_linkset.find(link.role, obj, link.my_role, link.rel_type)
except ValueError:
# The corresponding other link was not copied, so we have a
# degenerate one-sided relationship. Let's remove it
# altogether. It would not difficult to have a different
# function, cloneRelationshipsOnCopy, that would create
# a corresponding link in other_linkset.
links_to_remove.append(link)
for link in links_to_remove:
linkset.remove(link)
