def add(self, *obj_or_objs):
"""
添加一个新的 leancloud.Object 至 Relation。
:param obj_or_objs: 需要添加的对象或对象列表
"""
objs = obj_or_objs
if not isinstance(obj_or_objs, (list, tuple)):
objs = (obj_or_objs, )
change = operation.Relation(objs, ())
self.parent.set(self.key, change)
self.target_class_name = change._target_class_name
def remove(self, *obj_or_objs):
"""
从一个 Relation 中删除一个 leancloud.Object 。
:param obj_or_objs: 需要删除的对象或对象列表
:return:
"""
objs = obj_or_objs
if not isinstance(obj_or_objs, (list, tuple)):
objs = (obj_or_objs, )
change = operation.Relation((), objs)
self.parent.set(self.key, change)
self.target_class_name = change._target_class_name
def test_apply_relation_op():
album = leancloud.Object.create("Album",
objectId="abc001",
title="variety")
band1 = leancloud.Object.create("Band", objectId="abc101", name="xxx")
band2 = leancloud.Object.create("Band", objectId="abc102", name="ooo")
relation = album.relation("band")
op = operation.Relation([band1], [band2])
val = op._apply(None, album, "band")
assert isinstance(val, leancloud.Relation)
val._ensure_parent_and_key(album, "band")
val = op._apply(relation)
assert isinstance(val, leancloud.Relation)
val._ensure_parent_and_key(album, "band")