def followed_trainings_unicty(obj):
value = utils.get_invariant_data(obj, "followed_trainings")
if value is not None:
value.sort()
value2 = [x for x, _ in itertools.groupby(value)]
if len(value) > len(value2):
raise exception.FollowedTrainingDuplicated
def membership_fees_unicity(obj):
value = utils.get_invariant_data(obj, "membership_fees")
if value is not None:
if len(value) > len(set([e["year"] for e in value])):
raise exception.MembershipFeeDuplicated
