Rails%203%20In%20Action

Managing states
Now in this step definition you find the state by the name given to you by the step and
then find the link using the “When I follow [x] within [y]” step provided by Capybara.
When you run this feature again, you’re told that it can’t find the state element you’re
referencing:
And I follow "Make default" for the "New" state
scope '//*[@id = 'state_1']' not found on page (Capybara::ElementNotFound)
This is because you haven’t added the id attribute to your state li tags inside the app/
views/admin/states/index.html.erb. You can do this now by changing the following
line inside this view; while you’re here, also add the Make Default link:
To this:
When you run your feature again you’ll rightly be told that the make_default_admin
_state_path method is undefined. This method should take you to the make_default
action in the Admin::StatesController, much like edit_admin_state_path takes
you to the edit action. You can define this method as a member route on your states
resource. A member route provides the routing helpers and, more important, the
route itself, to a custom controller action for a single instance of a resource. To define
this, you change the resources :states line inside the admin namespace inside
config/routes.rb to the following:
resources :states do
member do
get :make_default
end
end
Inside the member block here, you define that each state resource has a new action
called make_default that can be accessed through a GET request. As stated previously,
by defining the route in this fashion you also get the
make_default_admin_state_path helper which you use in app/views/admin/states/
index.html.erb. With this member route now defined, your feature will complain that
it’s missing the make_default action:
And I follow "Make default" for the "New" state
The action 'make_default' could not be found for
Admin::StatesController (AbstractController::ActionNotFound)
The make_default action will be responsible for making the state you’ve selected the
new default state, as well as setting the old default state to not be the default anymore.
You can define this action inside app/controllers/admin/states_controller.rb, as shown
in the following listing.
275