Rails Root directory path?

Question

How do I get my Rails app\'s root directory path?

Answer 1

You can access rails app path using variable RAILS_ROOT.

For example:

render :file => "#{RAILS_ROOT}/public/layouts/mylayout.html.erb"

Answer 2

module Rails
  def self.root
    File.expand_path("..", __dir__)
  end
end

source: https://github.com/rails/rails/blob/5259062868dcf10fbcf735d6520e6a14e15fdcdb/actionmailer/test/abstract_unit.rb#L12

Answer 3

In addition to all the other correct answers, since Rails.root is a Pathname object, this won't work:

Rails.root + '/app/assets/...'

You could use something like join

Rails.root.join('app', 'assets')

If you want a string use this:

Rails.root.join('app', 'assets').to_s

Answer 4

For super correctness, you should use:

Rails.root.join('foo','bar')

which will allow your app to work on platforms where / is not the directory separator, should anyone try and run it on one.

Answer 5

Simply by Rails.root or if you want append something we can use it like Rails.root.join('app', 'assets').to_s

Answer 6

Simply By writing Rails.root and append anything by Rails.root.join(*%w( app assets)).to_s