Django 访问地址出现页面访问失败

部署Django样例访问提示：

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 

解决方法：需要在settings.py添加SITE_ID = 1