最近要用到Django，换成mysql出现了以下问题：
解决方法:
cd 到对应的目录
sed -i.old ‘s|\(ForeignKey.*\)default=0|\1default=None|g‘ 0005_*.py
即可解决
感谢：http://askbot.org/en/question/11851/valueerror-the-database-backend-does-not-accept-0-as-a-value-for-autofield/
Django：The database backend does not accept 0 as a value for AutoField,布布扣,bubuko.com
Django：The database backend does not accept 0 as a value for AutoField
原文：http://www.cnblogs.com/brucezhu/p/3898706.html