def context_from_method(fun, args, kwargs):
"""Currently works only for methods by assuming that the first
argument is `self`. Unfortunately we cannot know the dynamic binding
for the method because the @transact decorator is invoked at class
definition time.
If `self` is already a persistent object with a context attached, then that context
is returned, otherwise it searches for matching IContextExtractor subscription adpaters.
"""
that = args[0] if args else None
context = get_peristent_context(that)
if that:
extractors = querySubscriptions(that, IContextExtractor)
if extractors:
for i in extractors:
context.update(i.get_context())
return context
def context(obj):
if getattr(_context, 'x', None):
return _context.x
return get_peristent_context(obj)
def context(obj):
if getattr(_context, 'x', None):
return _context.x
return get_peristent_context(obj)