SwaggerUiEngine

Include swagger-ui as Rails engine and document your API with simple YAML files.

Versions

Features

• Supports API documentation versioning / multiple APIs documentation
• Easily configurable Swagger interface and OAuth2 authorization
• Enables using Swagger interface translations
• Works with API-only applications
• Simple, clear and actively maintained 🙆

Problem

Working on a Rails API, I've wanted to document my endpoints in the clearest and easiest way possible. My goal was to have the documentation separated from the actual codebase and to have a web UI version of Swagger for testing and reading it. Using Rails 5 default API, I didn't need to include Grape, so I took a look into some other existing solutions. Most of them were no longer supported (e.g. swagger_engine and swagger-ui_rails) or required adding some extra code for the actual documentation (e.g. swagger-docs). Also, none of them supported Swagger web UI configuration, so I decided to write and maintain a gem on my own that would allow others to include Swagger web UI as Rails engine and support writing simple documentation in YAML files.

Installation

Add to Gemfile

gem 'swagger_ui_engine'

And then run:

$ bundle

Usage

Mount

Add to your config/routes.rb

mount SwaggerUiEngine::Engine, at: "/api_docs"

You can place this route under admin_constraint or other restricted path, or configure basic HTTP authentication.

Devise auth

authenticate :user, lambda { |u| u.admin? } do
  mount SwaggerUiEngine::Engine, at: "/api_docs"
end

Basic HTTP auth

Set admin username and password in an initializer:

# config/initializers/swagger_ui_engine.rb

SwaggerUiEngine.configure do |config|
  config.admin_username = ENV['ADMIN_USERNAME']
  config.admin_password = ENV['ADMIN_PASSWORD']
end

Initialize

Versioned API documentations

Set the path of your json/yaml versioned documentations in an initializer:

# config/initializers/swagger_ui_engine.rb

SwaggerUiEngine.configure do |config|
  config.swagger_url = {
    v1: 'api/v1/swagger.yaml',
    v2: 'api/v2/swagger.yaml',
  }
end

and place your main documentation file under /public/api path.

Single API documentation

NOTE: This is a compatibility patch for the SwaggerUiEngine gem versions <= 0.0.5. It's recommended to version your API documentation from the beginning.

You can define your main documentation url in a hash value (same way as in the versioned documentations) or pass single string with the url:

# config/initializers/swagger_ui_engine.rb

SwaggerUiEngine.configure do |config|
  config.swagger_url = 'api/swagger.yaml'
end

Configure

OAuth2 configuration

You can configure OAuth2 default authorization.

Edit your json/yaml files

You can use Swagger editor to write and validate your Swagger docs.

Example app

Here's an example use of SwaggerUiEngine in Rails application.

Contributing

You're very much welcome to contribute to this repository. Start by creating a Github issue and describing your change thoroughly. If you decide to publish a pull request, please make sure it points to the latest versioned branch instead of master.

License

This project is available under MIT-LICENSE. ☀️