一、先看报错：
django 在处理datetime类型的的报错
/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/django/db/models/fields/__init__.py:1451: RuntimeWarning: DateTimeField Person.birthday received a naive datetime (2017-12-02 08:02:02.776941) while time zone support is active./Library/Fram
