Rails 5.2 issues

[DanielKehoe]

Rails 5.2 beta is out and I tried generating the 'learn-rails' example application with Rails Composer. It fails because The file /config/secrets.yml does not appear to exist. Note that Rails 5.2 no longer uses the /config/secrets.yml file. We'll have to change the 'learn-rails' example application and rewrite Book Two to use the new Rails 5.2 Encrypted Credentials feature. See RailsApps/rails_apps_composer#366

Also it looks like Devise (authentication) will fail with Rails 5.2. See heartcombo/devise#4710

[DanielKehoe]

I'm able to build and run the 'learn-rails' example application with Rails Composer (built using rails_apps_composer 3.1.30) with Ruby 2.5.0 and Rails 5.2.0.rc1.

Using RVM, I get lots of rake warnings with Ruby 2.5.0 like

/Users/danielkehoe/.rvm/gems/ruby-2.5.0@global/gems/rake-12.3.0/lib/rake/file_utils.rb:10: 
warning: already initialized constant FileUtils::RUBY

Removed RVM and no more warnings with rake.