Add this line to your application's Gemfile:

gem 'open_api_rack'

And then execute:

    $ bundle install

1. It's pretty simple. First register middleware for a test environment

Rails.application.configure
  config.middleware.insert_before 0, OpenApiRack::Middleware
end

Please, keep it only for test env!

2. Then, you need to configure the gem. Create an initializer file

OpenApiRack.configure do |config|
  # list of headers you want to follow
  config.headers_list = %w(access_token client uid access-token)

  # by default gem is enabled
  config.disable_by_default = true
end

header_list setting defines the headers you want to follow

3. Final step, start writing your request specs

RSpec.describe "Api::V1::Users", type: :request do
  describe "GET /" do
    before(:each) do
      get "/api/v1/users", params: { per_page: 5, page: 1, sort: 'email', order: 'desc' }
    end

    it "returns http success" do
      expect(response).to have_http_status(:success)
    end
  end
end

You may also exclude specific request from documentation by adding { "OA_SKIP_EXAMPLE" => "true" } to your request headers

get "/api/v1/users", params: { per_page: 5, page: 1, sort: 'email', order: 'desc' }, headers: { "OA_SKIP_EXAMPLE" => "true" }

If you decide to disable doc generation, you can turn it on for specific request

get "/api/v1/users", params: { per_page: 5, page: 1, sort: 'email', order: 'desc' }, headers: { "OA_INCLUDE_EXAMPLE" => "true" }

Generated docs stored in /public/open-api.yaml

Gem in active development

Known issues:

• not working for DELETE HTTP method

• not working for :no_content response

• can not define fields types

Bug reports and pull requests are welcome on GitHub at https://github.com/chhlga/open_api_rack. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

The gem is available as open source under the terms of the MIT License.

Everyone interacting in the OpenApiRack project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.