Mount Grape API at rails root

README.md

The Smalles Railes App with Grape mounted at the very root path

How to run

1. clone the gist
2. bundle install
3. bundle exec rackup
4. visit http://localhost:9292 and http://localhost:9292/moar

config.ru

# Thanks to http://thesmallestrailsapp.com/

Bundler.require

# Your grape API
class API < Grape::API
  get { "Hello from Grape" }

  get "/moar" do
    "Moar"
  end
end

run TheSmallestRailsApp ||= Class.new(Rails::Application) {
  config.secret_key_base = routes.append {
    mount API => "/"  # This will handle "/moar" and others
    root to: API      # This will handle the root path "/"
  }.to_s
  initialize!
}

Gemfile

source "http://rubygems.org"

gem "railties", '4.0.3', require: %w(action_controller rails)
gem "grape"