def destroy_chassis(self, chassis_id):
def chassis_not_empty():
"""Checks whether the chassis does not have nodes."""
query = model_query(models.Node)
query = add_node_filter_by_chassis(query, chassis_id)
return query.count() != 0
with _session_for_write():
if chassis_not_empty():
raise exception.ChassisNotEmpty(chassis=chassis_id)
query = model_query(models.Chassis)
query = add_identity_filter(query, chassis_id)
count = query.delete()
if count != 1:
raise exception.ChassisNotFound(chassis=chassis_id)
def destroy_chassis(self, chassis):
def chassis_not_empty(session):
"""Checks whether the chassis does not have nodes."""
query = model_query(models.Node, session=session)
query = add_node_filter_by_chassis(query, chassis)
return query.count() != 0
session = get_session()
with session.begin():
if chassis_not_empty(session):
raise exception.ChassisNotEmpty(chassis=chassis)
query = model_query(models.Chassis, session=session)
query = add_identity_filter(query, chassis)
count = query.delete()
if count != 1:
raise exception.ChassisNotFound(chassis=chassis)
