def modify_num(model, color, num):
"""
:param model:
:type model:
:param color:
:type color:
:param num:
:type num:
:return: number of row update, 0 if not find, error if modify_json is wrong
:rtype: int
"""
query = Storage.update(num=num).where(Storage.model == model,
Storage.color == color)
return query.execute()
def increment_num(model, color):
query = Storage.update(num=Storage.num + 1) \
.where(Storage.model == model, Storage.color == color)
return query.execute()