ruby-on-rails - Heroku: RAILS_ROOT returns app folder instead of root folder

Question

I have this RoR app that calls to RAILS_ROOT. When running it using rails server (or when checking with ./script/console) the value contains the app's root. When deploying and running it with Heroku, however (or when checking with heroku console), the returned path is '/app'.

Why's that?

Thanks

Answer 1

因为在 heroku 上，您的应用程序位于/app文件夹中（从根目录/）。它不是您的应用程序的 app 文件夹，即/app/app.

文件结构为：

/app/app/...
/app/config/..
/app/Gemfile
...

你可以做一个实验。

运行 heroku 控制台并发现文件结构。

> heroku console
> puts `ls`
> puts `pwd`