[WIP]用已有db进行rails开发

创建: 2019/01/16

晚点补上

https://qiita.com/edo1z/items/a0bf22b294406f00ec7c

https://qiita.com/kentosasa/items/da23def3bdcb6a7eadb6

注: 跳过migrate的方法, 不创建migrate和schema