Rails%203%20In%20Action

496 CHAPTER 17 Engines
Note that the params[:topic_id] here doesn’t need to be namespaced yet again
because you’re isolated. This feature is really saving you a lot of useless typing! Now,
with the action defined in the controller, you’re going to need a view too. You’ll
define it with a couple of lines in a new file at app/views/forem/posts/new.html.erb:
New Post
"form", :locals => { :post => post } %>
Always specify options when using locals
If, in this example, you used this line to render the partial
{ :post => post } %>
the :locals option would be ignored by render. You must always use the :partial
option in conjunction with the :locals option; otherwise it will not work.
With the code in the controller for the before_filter, the new action defined, and
the view written, when you run your spec again with bin/rspec spec/integration/
posts_spec.rb, you’ll be shown this error:
AbstractController::ActionNotFound:
The action 'create' could not be found for Forem::PostsController
You now need to define the create action within your Forem::PostsController:
def create
@post = @topic.posts.create(params[:post])
flash[:notice] = "Post has been created!"
redirect_to topic_path(@topic)
end
This action will create a new post for the topic with the non-namespaced parameters
that have been passed in, set the flash[:notice], and send the user back to the
topic_path(@topic) path. Hey, that’s about all that your test needs, isn’t it? Let’s find
out with another run of bin/rspec spec/integration/posts_spec.rb:
1 example, 0 failures
Awesome! That was easy, wasn’t it? You’ve now got a way for users to post replies to
topics for your engine in a couple of steps. You repeated a couple of the steps you performed
in the last section, but it’s good to have this kind of repetition to enforce the
concepts. Additionally, having topics without posts would be kind of silly.
Before you run your specs, RSpec has generated controller tests incorrectly for
your application, calling the classes inside the files at spec/controllers/forem/topics
_controller_spec.rb and spec/controllers/forem/posts_controller_spec.rb Topics-
Controller and PostsController, respectively. You will need to change these to