Rails routes and controller parameters [closed]

问题:

I have those two resources which share the same controller. So far, my approach was routing with an special type parameter:

resources :bazs do
  resources :foos, controller: :foos, type: :Foo
  resources :bars, controller: :foos, type: :Bar
end

The routes work as expected, but all my links are like this:

/bazs/1/foos/new?type=Foo
/bazs/1/bars/new?type=Bar

instead of

/bazs/1/foos/new
/bazs/1/bars/new

How do I pass parameters to the controller without messing the links?

回答1:

Try something like this:

resources :bazs do
  get ':type/new', to: 'foos#new'
end

For the verbs in which you need 2 IDs,

resources :bazs do
  get ':type/:id', to: 'foos#show', on: :member
end

Then you have both params[:bazs_id] and params[:id].

You can also do:

resources :bazs do
  member do
    get ':type/new', to: 'foos#new'
    get ':type/:id', to: 'foos#show'
  end
end

in order to always have params[:bazs_id].

For the root level conflicts you mentioned, you can do something like:

constraints(type: /foos|bars/) do
  get ':type/new', to: 'foos#new'
  get ':type/:id', to: 'foos#show'
end

回答2:

In your routes, type: is setting a parameter type which is appended on the URI. Another option could be, for each route, to define defaults, which would be parameters only be accessible by the controller and not appear in the URI.

The documentation on defaults explains this pretty well.

Example:

resources :bazs do
  resources :foos, controller: :foos
  resources :bars, controller: :foos
end