[Solved] Rails app works in development mode but not in production mode

[bobrock]

I have a Rails app running at https://bobrock.heliohost.us/home that does just fine in development mode. But when I switch to production mode the site will no longer load. Of course, in production mode, I can't see whatever error is causing the problem.

On my local machine, I can switch between development and production without any problems, but I had to add 

config.hosts << "localhost"

to the `production.rb` local environment file to make it work.

I added 

config.hosts << "bobrock.heliohost.us"

to the `production.rb` remote environment file, but that didn't clear the error.

What else should I try to get things running in production mode?

[wolstech]

This is a Krydos question. Basically nobody else uses RoR, support for it is rather new, and there is no log available on your end if you set it to production.

[Krydos]

Here's your error on production

App 3001142 output: Error: The application encountered the following error: Missing `secret_key_base` for 'production' environment, set this string with `bin/rails credentials:edit` (ArgumentError)

Maybe this will help? https://stackoverflow.com/a/51467308

[bobrock]

Thanks, Krydos! That was exactly the clue I needed. It turned out that my site was missing the `master.key` file, which, of course, was not uploaded as part of my GitHub repo because it's not there for security. Once I manually uploaded that file the site appears to be working now in production mode.

[Krydos]

Glad you got it working. Let us know if you need help with anything else.