It took me an hour to find what I was looking for, so it might help someone.
Whenever you inject the view in an object, for example when you create
presenters, writing your spec can be quite tricky as a simple stub of the view
is rapidly limited.
To make the situation easier with RSpec, you can give a look to two useful
In a classic resource oriented application/API, the nesting description is an important concern as it is a key of the simplicity of your model.
Back in 2007 Jamis Buck published this good article about the question, even if the syntax is not really up to date, it is still valid on a conceptual purpose http://weblog.jamisbuck.org/2007/2/5/nesting-resources.
Basically if this kind of situation happens that you have in your model
While describing your routes you can be tempted to take a shortcut and do this
However this is not a good solution when you want to retrieve a unique ressource like one comment, it would be good to avoid refering ids of the blog and post associated. A simple call to the ressource with its id should be enough.
There is still some actions in the CRUD requiring the nesting, the creation of a comment for example, if we want to associate a new comment to a specific blog, we can just post a form containing its attribute to the following URI
The rule in general is this “The maximum level of nesting is 1 only if you don’t already have the id of your ressource.”
Following this, a good routing description for our hierarchy would be.
albandiguer@iceberg ~/tmp/nesting $ rake routes [ruby-1.9.3-p194] blog_posts POST /blogs/:blog_id/posts(.:format) posts#create
new_blog_post GET /blogs/:blog_id/posts/new(.:format) posts#new
blogs GET /blogs(.:format) blogs#index
POST /blogs(.:format) blogs#create
new_blog GET /blogs/new(.:format) blogs#new
edit_blog GET /blogs/:id/edit(.:format) blogs#edit
blog GET /blogs/:id(.:format) blogs#show
PUT /blogs/:id(.:format) blogs#update
DELETE /blogs/:id(.:format) blogs#destroy
post_comments POST /posts/:post_id/comments(.:format) comments#create
new_post_comment GET /posts/:post_id/comments/new(.:format) comments#new
posts GET /posts(.:format) posts#index
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy
comments GET /comments(.:format) comments#index
edit_comment GET /comments/:id/edit(.:format) comments#edit
comment GET /comments/:id(.:format) comments#show
PUT /comments/:id(.:format) comments#update
DELETE /comments/:id(.:format) comments#destroy