Question

How do I better debug this message? The trace shows 3 lines from one of my files – application.rb:

18 module CustomApp
19   class Application < Rails::Application
...
49 # Enable the asset pipeline

Is there a way to find out exactly which file is throwing this error?

The last trace:

/home/user/.rvm/gems/ruby-1.9.3-p0/gems/figaro-0.2.0/lib/figaro/railtie.rb:8:in `update'

I feel like I’ve hit a brick wall..for that reason, although I’m anxious to fix this error, I’m more anxious to find out how to better debug these messages? Surely something like “Can’t convert Hash into String in somefile.rb:112” would be easily handled?

Answer 1

To learn about ruby-debug: http://bashdb.sourceforge.net/ruby-debug.html

To learn about debugging Rails: http://guides.rubyonrails.org/debugging_rails_applications.html

The error is coming from this file:

lib/figaro/railtie.rb line 8

The code block in that file:

path = Rails.root.join("config/application.yml")
ENV.update(YAML.load(File.read(path)) || {}) if File.exist?(path)

One way to troubleshoot is to use ruby-debug:

gem install ruby-debug

And edit that file to make it show better errors:

path = Rails.root.join("config/application.yml")
if File.exist?(path)
   debugger  
   f = File.read(path)  
   y = YAML.load(f)
   ENV.update(y || {})
end