今天用 devise 碰到问题，解决方案是这个 issue 中的第一条回复：
For some reason, restarting the rails server fixed this issue.
https://github.com/plataformatec/devise/issues/1773
好吧，又碰到类似情况 I had this same problem, and a simple restart of my server solved it.
今天用 devise 碰到问题，解决方案是这个 issue 中的第一条回复：
For some reason, restarting the rails server fixed this issue.
https://github.com/plataformatec/devise/issues/1773
好吧，又碰到类似情况 I had this same problem, and a simple restart of my server solved it.