错误信息：You‘re using the Django "sites framework" without having set the SITE_ID setting. Create a site in your database and set the SITE_ID setting to fix this error.
原因：settings.py里# Application definition中添加了‘django.contrib.sites‘模块后需要设置SITE_ID
处理：在settings.py里添加配置：SITE_ID = 1
本文出自 “Art_Hero” 博客，请务必保留此出处http://curran.blog.51cto.com/2788306/1600334
原文：http://curran.blog.51cto.com/2788306/1600334