def delete(self, relation_id, when=None):
if when is None:
when = datetime.now(utc)
relation = Relation.load_by_relation_id(self.env, relation_id)
source = relation.source
destination = relation.destination
relation_type = relation.type
with self.env.db_transaction:
cloned_relation = relation.clone()
relation.delete()
other_end = self.link_ends_map[relation_type]
if other_end:
reverted_relation = Relation(self.env,
keys=dict(
source=destination,
destination=source,
type=other_end,
))
reverted_relation.delete()
for listener in self.changing_listeners:
listener.deleting_relation(cloned_relation, when)
from bhrelations.notification import RelationNotifyEmail
RelationNotifyEmail(self.env).notify(cloned_relation, deleted=when)
def add(self,
source_resource_instance,
destination_resource_instance,
relation_type,
comment=None,
author=None,
when=None):
source = ResourceIdSerializer.get_resource_id_from_instance(
self.env, source_resource_instance)
destination = ResourceIdSerializer.get_resource_id_from_instance(
self.env, destination_resource_instance)
if relation_type not in self.link_ends_map:
raise UnknownRelationType(relation_type)
if when is None:
when = datetime.now(utc)
relation = Relation(self.env)
relation.source = source
relation.destination = destination
relation.type = relation_type
relation.comment = comment
relation.author = author
relation.when = when
self.add_relation(relation)
return relation
