Rails API

Transcript

1. API Only Applications with rails-api Saurabh Bhatia http://fedible.org

2. what? $ gem install rails-api Rails minus some middleware stack,

   actionpack modules and template generation.

3. why? • Lightweight • Fast • API only application –

   backend for mobile app, web application is just another client (e.g. html, angular.js ) to a json api.

4. Generating a new app $ rails-api new notesapp

5. No views

6. rails-api controller app/controllers/application_controller.rb class ApplicationController < ActionController::API end

7. controller actions def index @posts = Post.all render json: @posts

   end • rails-api uses render instead of respond methods. • Let's see how to include those.

8. extending controller class ApplicationController < ActionController::API include ActionController::MimeResponds include ActionController::ImplicitRender

   end • MimeResponds and Implicit render provide support for respond_to, respond_with.

9. middleware

10. extending middleware $config/application.rb require File.expand_path('../boot', __FILE__) require 'rails/all'. Bundler.require(:default, Rails.env)

    module Notesapp class Application < Rails::Application config.middleware.use ActionDispatch::Flash end end

11. extended

12. serializers • gem "active_model_serializers" • $rails g serialzer post •

    $ ls assets controllers mailers models serializers app$ cd serializers/ app/serializers$ ls post_serializer.rb

13. serialzers class PostSerializer < ActiveModel::Serializer attributes :title, :body end •

    JSON Response {"posts": [{"id":1,"title":"First Post","body":"Test"}, {"id":2,"title":"Second Post","body":"Another Test"}] }

14. Shameless Plug : Rails 4 application development

15. Thank you 謝謝