item_index_spec.rb

require 'spec_helper'


describe "items#index", :type => :request do
  let :date do
    Date.today
  end

  let! :item_1     do
    Item.create( :description => "Give a coding demo",
                 :due_date => date
               )
  end
  let! :item_2     do
    Item.create( :description => "Write demo code",
                 :due_date => date
               )
  end

  describe "GET /items" do
    it "shows item as json" do
      json_get "/items"

      expect(response).to be_success

      expect(response.body).to have_json_path("links")
      expect(response.body).to have_json_path("links/self")
      expect(response.body).to have_json_path("data")
      expect(response.body).to have_json_path("data/0/data/description")
      expect(response.body).to have_json_path("data/0/data/due_date")
      expect(response.body).to have_json_path("data/1/data/description")
      expect(response.body).to have_json_path("data/1/data/due_date")

      expect(response.body).to be_json_eql("\"Give a coding demo\"").at_path("data/0/data/description")
      expect(response.body).to be_json_eql("\"Write demo code\"").at_path("data/1/data/description")
    end
  end
end

item_list_serializer.rb

class MenuListSerializer < BaseSerializer
  def as_json_without_wrap(options={})
    object.map do |menu|
      ItemSerializer.new(menu).as_json
    end
  end

  def links
    { :self => routes.items_path  }
  end
end

item_serializer.rb

class ItemSerializer < BaseSerializer
  attributes :description, :due_date

  def links
    { :self => routes.item_path(object)  }
  end
end

item_show_spec.rb

require 'spec_helper'


describe "items#show", :type => :request do
  let :date do
    Date.today
  end

  let :item     do
    Item.create( :description => "Give a coding demo",
                 :due_date => date
               )
  end

  describe "GET /item/:id" do
    it "shows item as json" do
      json_get "/items/#{item.id}"

      expect(response).to be_success

      expect(response.body).to have_json_path("links")
      expect(response.body).to have_json_path("links/self")
      expect(response.body).to have_json_path("data")
      expect(response.body).to have_json_path("data/description")
      expect(response.body).to have_json_path("data/due_date")

      expect(response.body).to be_json_eql("\"Give a coding demo\"").at_path("data/description")
    end
  end
end

items_controller.rb

class ItemsController < ApplicationController
  respond_to :json

  def show
    @item = Item.find(params[:id])
    render :json => ItemSerializer.new(@item)
  end


  def index
    render :json => ItemListSerializer.new(Item.all)
  end

end

routes.rb

resources :items, :only => [ :show, :index, :create ]