当django开启时区之后，如果数据库中的datetime型字段仍用老的格式（如'2025-10-16 10:55:00'）赋值就会报出“RuntimeWarning: DateTimeField Datas.create_date received a naive datetime (2025-10-16 10:55:00) while time zone support is active.”这样的warning。

解决方法是用make_aware给老格式加上时区信息。

from django.utils.timezone import make_aware

now = '2025-10-16 10:55:00'
now_new = makeaware(now)