Revert "fix bug"

This reverts commit 19a527fe7953235b982d41f925f800f80c78dba0.
更新
定义shop字段
Merge pull request #2 from wayonglee/master

定义shop字段
定义customer模型
Merge pull request #3 from zxb19934/master

定义customer模型
修正格式错误
数据库更新
外键#5
Merge pull request #6 from wayonglee/master

外键 #5