CODEWITHSUNDEEP
ruby-on-railsrubyrubygemsyaml
squiter
squiter

Reputation: 5761

How to access a yaml in rails config path

I'm writting a ruby gem and I want to let user use your own yaml file configuration, but I don't know how to test if the user_config.yml exists into rails config path.
I want to use user_config.yml only if this file exists into config path.

Upvotes: 5

Views: 5496

Answers (2)

Jeremy Roman
Jeremy Roman

Reputation: 16355

Rails.root (or RAILS_ROOT in earlier versions of Rails) gives you the path of the application root. From there, you can see if the file you're interested in exists.

e.g.

path = File.join(Rails.root, "config", "user_config.yml")
if File.exists?(path)
  # do something
end

Upvotes: 13

Luke Mueller
Luke Mueller

Reputation: 263

you can access your Rails App's load path with the $LOAD_PATH variable which is of type Array.

Thus

if $LOAD_PATH.include?('/path/where/user/should/put/their/user_config.yml')
  # EDIT
  config_options = File.new('rails_app/config/user_config.yml', 'r')
else
  # EDIT
  config_options = File.new('path/to/default/config.yml', 'r')
end

There is also another useful method for the Ruby File class called #exists? which will of course check to see if a file exists. See File class docs for more.

Hope this gets you started. Your question was rather vague, reply with more details if you need more help.

Upvotes: 1

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