如何在 URL 中间编写一个带有 RESTful 参数的 Rails 路由？

Question

I'm using Rails 5. Let's say I want to write a route to support a URL of the following form

/posts/:key/comment

and I would like it to route to the "index" action of my posts_controller. ":key" is not an ID, just an alpha-numeric sequence that I'd like ot access in my method using params[:key]. There are no other methosd in my controller other than index. How would I do this?

Answer 1

If I do:

get "posts/:key/comment", to: 'posts#index'
resources :posts, only: [:index]

...then I get:

          GET    /posts/:key/comment(.:format)     posts#index
    posts GET    /posts(.:format)                  posts#index

Which I think is what you're looking for.