摘要：
django报错：/usr/local/lib/python2.7/dist-packages/Django-1.8.2-py2.7.egg/django/db/models/fields/init.py:1474:RuntimeWarning:DateTimeFieldOrg.updatedAtreceivedanaivedatetime(2017-06-1604:51:17)whiletime
django报错：
/usr/local/lib/python2.7/dist-packages/Django-1.8.2-py2.7.egg/django/db/models/fields/init.py:1474: RuntimeWarning: DateTimeField Org.updatedAt received a naive datetime (2017-06-16 04:51:17) while time zone support is active.
RuntimeWarning
解决方法：
时区问题，datetime.now()生成的不带时区的utc时间称为native time
使用django.utils.timezone.now()输出的是带时区的utc时间，称为active time
懒得一个个改，so：
# from datetime import datetime # 注释的
from django.utils import timezone as datetime # 添加的参考文献：
1、https://blog.csdn.net/heybob/article/details/77319867 2019.6.27
2、http://www.zhixing123.cn/php/django-datetimefield-received-a-naive-da.html 2019.6.27
3、https://stackoverflow.com/questions/22028004/django-datetimefield-received-a-naive-datetime