def merge(self, session, source, dest, dont_load, _recursive):
value = attributes.get_as_list(source._state, self.key, passive=True)
if value:
setattr(dest, self.key, value[0])
else:
# TODO: lazy callable should merge to the new instance
dest._state.expire_attributes([self.key])
def merge(self, session, source, dest, dont_load, _recursive):
if not dont_load and self._reverse_property and (source, self._reverse_property) in _recursive:
return
if not "merge" in self.cascade:
dest._state.expire_attributes([self.key])
return
instances = attributes.get_as_list(source._state, self.key, passive=True)
if not instances:
return
if self.uselist:
dest_list = []
for current in instances:
_recursive[(current, self)] = True
obj = session.merge(current, entity_name=self.mapper.entity_name, dont_load=dont_load, _recursive=_recursive)
if obj is not None:
dest_list.append(obj)
if dont_load:
coll = attributes.init_collection(dest, self.key)
for c in dest_list:
coll.append_without_event(c)
else:
getattr(dest.__class__, self.key).impl._set_iterable(dest._state, dest_list)
else:
current = instances[0]
if current is not None:
_recursive[(current, self)] = True
obj = session.merge(current, entity_name=self.mapper.entity_name, dont_load=dont_load, _recursive=_recursive)
if obj is not None:
if dont_load:
dest.__dict__[self.key] = obj
else:
setattr(dest, self.key, obj)
def merge(self, session, source, dest, dont_load, _recursive):
value = attributes.get_as_list(source._state, self.key, passive=True)
if value:
setattr(dest, self.key, value[0])
else:
# TODO: lazy callable should merge to the new instance
dest._state.expire_attributes([self.key])
def merge(self, session, source, dest, dont_load, _recursive):
if not dont_load and self._reverse_property and (source, self._reverse_property) in _recursive:
return
if not "merge" in self.cascade:
dest._state.expire_attributes([self.key])
return
instances = attributes.get_as_list(source._state, self.key, passive=True)
if not instances:
return
if self.uselist:
dest_list = []
for current in instances:
_recursive[(current, self)] = True
obj = session.merge(current, entity_name=self.mapper.entity_name, dont_load=dont_load, _recursive=_recursive)
if obj is not None:
dest_list.append(obj)
if dont_load:
coll = attributes.init_collection(dest, self.key)
for c in dest_list:
coll.append_without_event(c)
else:
getattr(dest.__class__, self.key).impl._set_iterable(dest._state, dest_list)
else:
current = instances[0]
if current is not None:
_recursive[(current, self)] = True
obj = session.merge(current, entity_name=self.mapper.entity_name, dont_load=dont_load, _recursive=_recursive)
if obj is not None:
if dont_load:
dest.__dict__[self.key] = obj
else:
setattr(dest, self.key, obj)
def cascade_iterator(self, type_, state, visited_instances, halt_on=None):
if not type_ in self.cascade:
return
passive = type_ != 'delete' or self.passive_deletes
mapper = self.mapper.primary_mapper()
instances = attributes.get_as_list(state, self.key, passive=passive)
if instances:
for c in instances:
if c is not None and c not in visited_instances and (halt_on is None or not halt_on(c)):
if not isinstance(c, self.mapper.class_):
raise exceptions.AssertionError("Attribute '%s' on class '%s' doesn't handle objects of type '%s'" % (self.key, str(self.parent.class_), str(c.__class__)))
visited_instances.add(c)
# cascade using the mapper local to this object, so that its individual properties are located
instance_mapper = object_mapper(c, entity_name=mapper.entity_name)
yield (c, instance_mapper, c._state)
def cascade_iterator(self, type_, state, visited_instances, halt_on=None):
if not type_ in self.cascade:
return
passive = type_ != 'delete' or self.passive_deletes
mapper = self.mapper.primary_mapper()
instances = attributes.get_as_list(state, self.key, passive=passive)
if instances:
for c in instances:
if c is not None and c not in visited_instances and (halt_on is None or not halt_on(c)):
if not isinstance(c, self.mapper.class_):
raise exceptions.AssertionError("Attribute '%s' on class '%s' doesn't handle objects of type '%s'" % (self.key, str(self.parent.class_), str(c.__class__)))
visited_instances.add(c)
# cascade using the mapper local to this object, so that its individual properties are located
instance_mapper = object_mapper(c, entity_name=mapper.entity_name)
yield (c, instance_mapper, c._state)
