Agile Web Development with Rails, Edition 4

15.3 Iteration J3: Limiting Access

require authorization before every access

edit app/controllers/application_controller.rb

class ApplicationController < ActionController::Base

  before_action :authorize

    # ...

  protected

    def authorize

      unless User.find_by(id: session[:user_id])

        redirect_to login_url, notice: "Please log in"

end

end

end

whitelist the sessions and store controllers

edit app/controllers/sessions_controller.rb

class SessionsController < ApplicationController

  skip_before_action :authorize

edit app/controllers/store_controller.rb

class StoreController < ApplicationController

  skip_before_action :authorize

whitelist cart operations

edit app/controllers/carts_controller.rb

class CartsController < ApplicationController

  skip_before_action :authorize, only: [:create, :update, :destroy]

  # ...

  private

  # ...

    def invalid_cart

      logger.error "Attempt to access invalid cart #{params[:id]}"

      redirect_to store_index_url, notice: 'Invalid cart'

end

end

whitelist line_item operations

edit app/controllers/line_items_controller.rb

class LineItemsController < ApplicationController

  skip_before_action :authorize, only: :create

whitelist order operations

edit app/controllers/orders_controller.rb

class OrdersController < ApplicationController

  skip_before_action :authorize, only: [:new, :create]

Cause all tests to do an implicit login

edit test/test_helper.rb

ENV['RAILS_ENV'] ||= 'test'

require File.expand_path('../../config/environment', __FILE__)

require 'rails/test_help'

class ActiveSupport::TestCase

  # Setup all fixtures in test/fixtures/*.yml for all tests in alphabetical order.

  fixtures :all

  # ...

  # Add more helper methods to be used by all tests here...

  def login_as(user)

    session[:user_id] = users(user).id

end

  def logout

    session.delete :user_id

end

  def setup

    login_as :one if defined? session

end

end

Show that the now pass

rake test

Run options: --seed 65329

# Running:

........................................................

Finished in 0.970660s, 57.6927 runs/s, 175.1385 assertions/s.

56 runs, 170 assertions, 0 failures, 0 errors, 0 skips