[Rails] relative_url_root doesn't work correctly with Rails 5.1.4

Ruby on Rails Tuesday, October 24, 2017

Hello.

I faced 404 errors for asset pipeline URLs when I set config.relative_url_root with Rails 5.1.4/

What I did was as follows.

1. Put the following lines in development.rb.

ENV["RAILS_RELATIVE_URL_ROOT"] = "/subdir"

config.relative_url_root = "/subdir"

2. Modified config.ru as follows.

map ActionController::Base.config.relative_url_root || "/" do

run Rails.application

end

3. Then start rails server

rails server puma -d -b 0.0.0.0

4. See the application application page

http://localhost:3000/subdir

Some of asset URLs get 404 error and not shown.

Of course, commenting #1 works well.

Could you please advice how to fix this?

Someone, please try to do above as it's easy to setup...

Thanks,

Kusumoto

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