def getdotattr(obj_or_class, dot_path, condition=None):
"""
Allow dot-notated strings to be passed to `getattr`.
::
getdotattr(SubSection, 'section.document')
getdotattr(subsection, 'section.document')
:param obj_or_class: Any object or class
:param dot_path: Attribute path with dot mark as separator
"""
last = obj_or_class
for path in str(dot_path).split('.'):
getter = attrgetter(path)
if is_sequence(last):
tmp = []
for element in last:
value = getter(element)
if is_sequence(value):
tmp.extend(value)
else:
tmp.append(value)
last = tmp
elif isinstance(last, InstrumentedAttribute):
last = getter(last.property.mapper.class_)
elif last is None:
return None
else:
last = getter(last)
if condition is not None:
if is_sequence(last):
last = [v for v in last if condition(v)]
else:
if not condition(last):
return None
return last
def getdotattr(obj_or_class, dot_path, condition=None):
"""
Allow dot-notated strings to be passed to `getattr`.
::
getdotattr(SubSection, 'section.document')
getdotattr(subsection, 'section.document')
:param obj_or_class: Any object or class
:param dot_path: Attribute path with dot mark as separator
"""
last = obj_or_class
for path in str(dot_path).split('.'):
getter = attrgetter(path)
if is_sequence(last):
tmp = []
for element in last:
value = getter(element)
if is_sequence(value):
tmp.extend(value)
else:
tmp.append(value)
last = tmp
elif isinstance(last, InstrumentedAttribute):
last = getter(last.property.mapper.class_)
elif last is None:
return None
else:
last = getter(last)
if condition is not None:
if is_sequence(last):
last = [v for v in last if condition(v)]
else:
if not condition(last):
return None
return last
def invoke_callbacks(self, session, ctx, instances):
callback_args = defaultdict(lambda: defaultdict(set))
for obj, callbacks in self.changed_objects(session):
args = self.gather_callback_args(obj, callbacks)
for (root_obj, func, objects) in args:
if is_sequence(objects):
callback_args[root_obj][func] = (
callback_args[root_obj][func] | set(objects))
else:
callback_args[root_obj][func] = objects
for root_obj, callback_objs in callback_args.items():
for callback, objs in callback_objs.items():
callback(root_obj, objs)
def invoke_callbacks(self, session, ctx, instances):
callback_args = defaultdict(lambda: defaultdict(set))
for obj, callbacks in self.changed_objects(session):
args = self.gather_callback_args(obj, callbacks)
for (root_obj, func, objects) in args:
if is_sequence(objects):
callback_args[root_obj][func] = (
callback_args[root_obj][func] | set(objects)
)
else:
callback_args[root_obj][func] = objects
for root_obj, callback_objs in callback_args.items():
for callback, objs in callback_objs.items():
callback(root_obj, objs)
