Rails%203%20In%20Action

Adding more posts to topics
Let’s start with running this test using bin/rspec spec/integration/
posts_spec.rb. It will get through the first two steps, but fail because it cannot find a
Reply link:
Capybara::ElementNotFound:
no link with title, id or text 'Reply' found
This link needs to go in the app/views/forem/posts/_post.html.erb, and you can do
that by using this text and placing it inside the div_for in the file, as that’s where your
test is expecting the link to be:
This Reply link will go to the new action within the Forem::PostsController. The
nested route helper that you use, new_topic_post_path, will again reference only the
engine’s new_topic_post_path because the engine is isolated. To define this route
helper and the relevant routes for it, you’ll open config/routes.rb and alter this line
resources :topics
to now be these lines:
resources :topics do
resources :posts
end
When you re-run your spec, you get this error:
ActionController::RoutingError:
uninitialized constant Forem::PostsController
You need to generate this controller, which you can do by running this command:
rails g controller posts
Again, this will generate a namespaced controller because you’ve isolated your
engine. In this controller, you’re going to need to define a new action, as well as a
before_filter to load the topic. You’ll change your Forem::PostsController into
what’s shown in the following listing.
Listing 17.11 app/controllers/forem/posts_controller.rb
module Forem
class PostsController < ApplicationController
before_filter :find_topic
def new
@post = @topic.posts.build
end
private
def find_topic
@topic = Forem::Topic.find(params[:topic_id])
end
end
end
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