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add ParentRelation property descriptor

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git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@2913 fd906abe-77d9-0310-91a1-e0d9ade77398
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helmutm 2008-10-09 13:03:58 +00:00
parent 96043fb340
commit ab0e08e67d
1 changed files with 25 additions and 4 deletions
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29
common.py
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@ -302,10 +302,10 @@ class RelationSet(object):
class ParentRelationSet(RelationSet): class ParentRelationSet(RelationSet):
def add(self, related): def add(self, related, order=0, relevance=1.0):
if isinstance(related, AdapterBase): if isinstance(related, AdapterBase):
related = related.context related = related.context
self.context.assignParent(related, self.predicate) self.context.assignParent(related, self.predicate, order, relevance)
def remove(self, related): def remove(self, related):
if isinstance(related, AdapterBase): if isinstance(related, AdapterBase):
@ -319,10 +319,10 @@ class ParentRelationSet(RelationSet):
class ChildRelationSet(RelationSet): class ChildRelationSet(RelationSet):
def add(self, related): def add(self, related, order=0, relevance=1.0):
if isinstance(related, AdapterBase): if isinstance(related, AdapterBase):
related = related.context related = related.context
self.context.assignChild(related, self.predicate) self.context.assignChild(related, self.predicate, order, relevance)
def remove(self, related): def remove(self, related):
if isinstance(related, AdapterBase): if isinstance(related, AdapterBase):
@ -370,6 +370,27 @@ class ChildRelationSetProperty(RelationSetProperty):
factory = ChildRelationSet factory = ChildRelationSet
class ParentRelation(object):
def __init__(self, predicateName):
self.predicateName = predicateName
def __get__(self, inst, class_=None):
if inst is None:
return self
for obj in ParentRelationSet(inst, self.predicateName):
return obj
return None
def __set__(self, inst, value):
s = ParentRelationSet(inst, self.predicateName)
for current in s:
if current != value:
s.remove(current)
if value is not None:
s.add(value)
# caching (TBD) # caching (TBD)
def cached(obj): def cached(obj):