Agile Web Development with Rails, Edition 4

13.1 Iteration H1: Email Notifications 12.3 Iteration G3: Downloading an eBook

12.4 Playtime

Missing <email>customer@example.com</email>.
<0> expected to be
>=
<1>.

Traceback:
  /home/rubys/git/awdwr/edition4/checkdepot.rb:264:in `block in <class:DepotTest>'

Add the xml format to the controller

edit app/controllers/products_controller.rb
  def who_bought
    @product = Product.find(params[:id])
    @latest_order = @product.orders.order(:updated_at).last
    if stale?(@latest_order)
      respond_to do |format|
        format.xml { render :xml => @product }
        format.atom
      end
    end
  end

Fetch the XML, see that there are no orders there

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought.atom

Include "orders" in the response

edit app/controllers/products_controller.rb
  def who_bought
    @product = Product.find(params[:id])
    @latest_order = @product.orders.order(:updated_at).last
    if stale?(@latest_order)
      respond_to do |format|
        format.xml { render xml: @product.to_xml(include: :orders) }
        format.atom
      end
    end
  end

Fetch the xml, see that the orders are included

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought.xml

Define an HTML view

edit app/views/products/who_bought.html.erb
<h3>People Who Bought <%= @product.title %></h3>
 
<ul>
  <% for order in @product.orders %>
    <li>
      <%= mail_to order.email, order.name %>
    </li>
  <% end %>
</ul>

Add the html format to the controller

edit app/controllers/products_controller.rb
  def who_bought
    @product = Product.find(params[:id])
    @latest_order = @product.orders.order(:updated_at).last
    if stale?(@latest_order)
      respond_to do |format|
        format.html
        format.xml { render xml: @product.to_xml(include: :orders) }
        format.atom
      end
    end
  end

See the (raw) HTML

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought

Anything that XML can do, JSON can too...

edit app/controllers/products_controller.rb
  def who_bought
    @product = Product.find(params[:id])
    @latest_order = @product.orders.order(:updated_at).last
    if stale?(@latest_order)
      respond_to do |format|
        format.html
        format.xml { render xml: @product.to_xml(include: :orders) }
        format.atom
        format.json { render json: @product.to_json(include: :orders) }
      end
    end
  end

Fetch the data in JSON format

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought.json

Customize the xml

edit app/views/products/who_bought.xml.builder
xml.order_list(:for_product => @product.title) do
  for o in @product.orders
    xml.order do
      xml.name(o.name)
      xml.email(o.email)
    end
  end
end

Change the rendering to use templates

edit app/controllers/products_controller.rb
  def who_bought
    @product = Product.find(params[:id])
    @latest_order = @product.orders.order(:updated_at).last
    if stale?(@latest_order)
      respond_to do |format|
        format.html
        format.xml
        format.atom
        format.json { render json: @product.to_json(include: :orders) }
      end
    end
  end

Fetch the (much streamlined) XML

curl --max-time 15 --silent --user dave:secret http://localhost:3000/products/2/who_bought.xml

Verify that the tests still pass

rails test
DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead. From module, you can access the original method using super. (called from included at /home/rubys/.rvm/gems/ruby-2.3.0/gems/turbolinks-2.5.3/lib/turbolinks/xhr_url_for.rb:7)
DEPRECATION WARNING: alias_method_chain is deprecated. Please, use Module#prepend instead. From module, you can access the original method using super. (called from included at /home/rubys/.rvm/gems/ruby-2.3.0/gems/turbolinks-2.5.3/lib/turbolinks/xhr_url_for.rb:7)
rails aborted!
ActiveRecord::NoEnvironmentInSchemaError: 

    
Environment data not found in the schema. To resolve this issue, run: 

    
	bin/rails db:environment:set RAILS_ENV=test

    
/home/rubys/git/rails/activerecord/lib/active_record/migration.rb:1259:in `last_stored_environment'
/home/rubys/git/rails/activerecord/lib/active_record/tasks/database_tasks.rb:48:in `check_protected_environments!'
/home/rubys/git/rails/activerecord/lib/active_record/railties/databases.rake:11:in `block (2 levels) in <top (required)>'
/home/rubys/git/rails/activerecord/lib/active_record/railties/databases.rake:375:in `block (3 levels) in <top (required)>'
/home/rubys/git/rails/railties/lib/rails/commands/rake_proxy.rb:13:in `block in run_rake_task'
/home/rubys/git/rails/railties/lib/rails/commands/rake_proxy.rb:10:in `run_rake_task'
/home/rubys/git/rails/railties/lib/rails/commands/commands_tasks.rb:51:in `run_command!'
/home/rubys/git/rails/railties/lib/rails/command.rb:20:in `run'
/home/rubys/git/rails/railties/lib/rails/commands.rb:19:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'
Tasks: TOP => db:test:load => db:test:purge => db:check_protected_environments
(See full trace by running task with --trace)
/home/rubys/git/rails/activerecord/lib/active_record/migration.rb:578:in `check_pending!':  (ActiveRecord::PendingMigrationError)

    
Migrations are pending. To resolve this issue, run:

    
	bin/rails db:migrate RAILS_ENV=test

    
	from /home/rubys/git/rails/activerecord/lib/active_record/migration.rb:591:in `load_schema_if_pending!'
	from /home/rubys/git/rails/activerecord/lib/active_record/migration.rb:597:in `block in maintain_test_schema!'
	from /home/rubys/git/rails/activerecord/lib/active_record/migration.rb:828:in `suppress_messages'
	from /home/rubys/git/rails/activerecord/lib/active_record/migration.rb:602:in `method_missing'
	from /home/rubys/git/rails/activerecord/lib/active_record/migration.rb:597:in `maintain_test_schema!'
	from /home/rubys/git/rails/railties/lib/rails/test_help.rb:15:in `<top (required)>'
	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:302:in `require'
	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:302:in `block in require'
	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:268:in `load_dependency'
	from /home/rubys/git/rails/activesupport/lib/active_support/dependencies.rb:302:in `require'
	from /home/rubys/git/awdwr/edition4/work-230/depot/test/test_helper.rb:3:in `<top (required)>'
	from /home/rubys/git/awdwr/edition4/work-230/depot/test/controllers/carts_controller_test.rb:1:in `require'
	from /home/rubys/git/awdwr/edition4/work-230/depot/test/controllers/carts_controller_test.rb:1:in `<top (required)>'
	from /home/rubys/git/rails/railties/lib/rails/test_unit/test_requirer.rb:11:in `require'
	from /home/rubys/git/rails/railties/lib/rails/test_unit/test_requirer.rb:11:in `block in require_files'
	from /home/rubys/git/rails/railties/lib/rails/test_unit/test_requirer.rb:10:in `each'
	from /home/rubys/git/rails/railties/lib/rails/test_unit/test_requirer.rb:10:in `require_files'
	from /home/rubys/git/rails/railties/lib/rails/test_unit/minitest_plugin.rb:75:in `plugin_rails_init'
	from /home/rubys/.rvm/gems/ruby-2.3.0@global/gems/minitest-5.8.3/lib/minitest.rb:74:in `block in init_plugins'
	from /home/rubys/.rvm/gems/ruby-2.3.0@global/gems/minitest-5.8.3/lib/minitest.rb:72:in `each'
	from /home/rubys/.rvm/gems/ruby-2.3.0@global/gems/minitest-5.8.3/lib/minitest.rb:72:in `init_plugins'
	from /home/rubys/.rvm/gems/ruby-2.3.0@global/gems/minitest-5.8.3/lib/minitest.rb:123:in `run'
	from /home/rubys/git/rails/railties/lib/rails/commands/test.rb:9:in `<top (required)>'
	from /home/rubys/git/rails/railties/lib/rails/commands/commands_tasks.rb:138:in `require'
	from /home/rubys/git/rails/railties/lib/rails/commands/commands_tasks.rb:138:in `require_command!'
	from /home/rubys/git/rails/railties/lib/rails/commands/commands_tasks.rb:95:in `test'
	from /home/rubys/git/rails/railties/lib/rails/commands/commands_tasks.rb:49:in `run_command!'
	from /home/rubys/git/rails/railties/lib/rails/command.rb:20:in `run'
	from /home/rubys/git/rails/railties/lib/rails/commands.rb:19:in `<top (required)>'
	from bin/rails:4:in `require'
	from bin/rails:4:in `<main>'

Commit

git commit -a -m "Orders"
[master af9c36e] Orders
 6 files changed, 68 insertions(+), 33 deletions(-)
git tag iteration-g

13.1 Iteration H1: Email Notifications 12.3 Iteration G3: Downloading an eBook