gistfile1.rb

# ====== TODAY'S KATA:

# * create an Achievements API
# * create an Achievement model, a User model, and a db table for many-many relationship between the two
# * now, write the Goliath+Grape code to create 3 endpoints:
# *   1. an endpoint to SHOW an Achievement (GET /v1/achievements/1)
# *   2. an endpoint to SHOW a User (GET /v1/users/1)
# *   3. an endpoint to GRANT an Achievement to a user (???)

# EXAMPLE GEMFILE THAT SHOULD WORK:
gem 'rack-fiber_pool'
gem 'mysql2'
gem 'activerecord'
gem 'em-synchrony'
gem 'em-http-request'
gem 'grape'
gem 'goliath'
gem 'multi_json'
gem 'oj'
gem 'rabl'
gem 'standalone_migrations'
gem 'rake'
gem 'rspec'
gem 'pry'
gem 'rb-readline'



# in case you need it...
# /config/application.rb
require 'em-synchrony/activerecord'
require 'yaml'

# ---- SETUP THE DATABASE CONNECTION
db = YAML.load(File.open('config/database.yml'))[Goliath.env.to_s]
puts "Establishing db connection: #{db.inspect}"
ActiveRecord::Base.establish_connection(db)


# app.rb
require 'rubygems'
require 'bundler/setup'
require 'goliath'
require 'em-synchrony/activerecord'
require 'grape'

Dir["./app/models/*.rb"].each { |f| require f }

require './app/api'

class Application < Goliath::API

  def response(env)
    ::API.call(env)
  end

end




# app/api.rb
Dir["./app/apis/v1/*.rb"].each { |f| require f }

class API < Grape::API

  helpers do
    
    def custom_render(rabl_template, object, status, args={})
      args[:format] ||= 'json'
      args[:success] ||= true
      render_options = { format: args[:format] }
      render_options[:locals] = args[:locals] if args[:locals]
      data = Rabl::Renderer.new(rabl_template, object, render_options).render
      %({ "success": #{args[:success]}, "data": #{data} })
    end

  end

  mount APIv1::Unlocks

  resource 'servicehealth' do
    desc "Returns a basic status report."
    get "/" do
      MultiJson.dump({ 
        status: 'OK',
        environment: Goliath::env })
    end
  end

end

# app/apis/v1/unlocks.rb
class APIv1
  class Unlocks < Grape::API

    version 'v1', using: :path, format: :json

    resource :unlocks do

      # GET /unlocks/1.json
      desc "Returns a single Unlock record by ID"
      get "/:id" do
        unlock = Unlock.find(params[:id])
        custom_render "api_v1/unlocks/show", unlock, 200
      end

    end

  end
end


# app/views/api_v1/unlocks/show.json.rabl
attributes :id, :name, :code, :description, :created_at

node(:unique_tags) { |unlock| unlock.tags.uniq }

child :images => :images do
  attributes :id, :caption, :mime_type, :url
end


# app/models/unlock.rb
require 'rocket_tag'

class Unlock < ActiveRecord::Base

  has_many :images, as: :image_attachable, dependent: :destroy

  attr_taggable :tags

  validates :name,    presence: true
  validates :code,    presence: true

end