How to read JS file in my Ruby on Rails app?

Question

I have a scenario where I have to read index.js in my rails controller.

Inside controller method, I have to get this index.js and I can't seem to read it with File.open() or File.read(). I tried relative path.

How can I read index.js in my controller?

What error did you get when you tried `File.open("device/setup/index.js")` — JP Silvashy, Aug 12 '21 at 12:46
Does this answer your question? [How to read whole file in Ruby?](https://stackoverflow.com/questions/3328495/how-to-read-whole-file-in-ruby) — Jared Beck, Aug 12 '21 at 19:28
Reading file is no problem. I could do it after opening the correct file. Thanks to JP Silvashy for providing `Rails.root` solution. It solved my problem of getting to correct file directory. — Nan Da, Aug 13 '21 at 01:32

score 1 · Accepted Answer · answered Aug 12 '21 at 12:47

1

Try using Rails.root to reference the root path of the app:

file = File.open(Rails.root.join('device', 'setup', 'index.js'))

answered Aug 12 '21 at 12:47

JP Silvashy

Thanks JP Silvashy. `Rails.root` works like a charm. I can open the file now. Hope it will still work on production server. – Nan Da Aug 12 '21 at 14:17
1

Yes this will work on a production server as well! Good Luck! – JP Silvashy Aug 12 '21 at 14:52

1 Answers1