[Feature request][ActionPack::ActionDispatch::Routing] Add parameter for resources to alias "only: []" in routes.rb

[François Belle]

I would like to propose a feature that would be kind of an alias for 

resources :users, only: [] do
  ...
end

I thinks it's weird to have to specify an empty array when we need a resourceful route without the default CRUD generated along.

It would allow us to use it like the shallow feature:

resources :users, without_crud: true do
  get :unsubscribe, on: :collection
  get :foo
  post :bar
end

And generate only:

GET /users/unsubscribe
GET /users/:id/foo
POST /users/:id/bar

Any feedback would be greatly appreciated, thank you guys!

[Nicholas Schwaderer]

I feel that `only: []` definitely is not an intuitive approach that shows what you would be trying to achieve in that instance. 

Also, I believe your only current alternative would be writing out your resourcing 'longhand' outside of an actual resources block in your `routes.rb`, correct? (I have seen all too many apps bloat with a lot of handscrawled routes)

But since this is a bit aways from normal `resources` namespace usage maybe your alias ought to go all the way up to `resources` itself.... such as:

```

resources_without_crud :users do

  ...

end

```

When I think of `resources` I think of the crud rails magic, and maybe it would help to make that even more explicit. Very interesting thought and thank you for raising it.

[Kevin Deisz]

You can achieve this functionality by throwing this into the top of your routes drawing block:

```

def subresources(name, &block)

    resources(name, only: [], &block)

  end

```

since that block is getting instance_eval'd anyway, this will just put that method onto the routes object. Then you can:

```

subresources :users do

  ...

end

```

and it'll have the same effect.

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Kevin D. Deisz

CTO, CultureHQ

[Rob Biedenharn]

If you don't want the `resources` anyway, why not just use `namespace`:

==> config/routes.rb <==

Rails.application.routes.draw do

  namespace 'users' do

    get  'unsubscribe'

    get  ':id/foo', action: :foo, as: :foo

    post ':id/bar', action: :bar, as: :bar

  end

end

           Prefix Verb URI Pattern                  Controller#Action

users_unsubscribe GET  /users/unsubscribe(.:format) users#unsubscribe

        users_foo GET  /users/:id/foo(.:format)     users#foo

        users_bar POST /users/:id/bar(.:format)     users#bar

-Rob

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[Kevin Deisz]

Namespace is semantically different in that sub resources are nestled under an instance of the resource they represent, not just a static string. 

i.e., /resource/1/subresource, not /resource/subresource

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Kevin D. Deisz

CTO, CultureHQ

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