fixed bug with nested resources within shallow scope

[#6372 state:committed]
Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -1199,7 +1199,7 @@ def namespace(path, options = {})
         end
 
         def shallow
-          scope(:shallow => true) do
+          scope(:shallow => true, :shallow_path => @scope[:path]) do
             yield
           end
         end

actionpack/test/dispatch/routing_test.rb

@@ -205,6 +205,14 @@ def self.call(params, request)
         end
       end
 
+      scope '/hello' do
+        shallow do
+          resources :notes do
+            resources :trackbacks
+          end
+        end
+      end
+
       resources :threads, :shallow => true do
         resource :owner
         resources :messages do
@@ -1676,6 +1684,60 @@ def test_shallow_nested_resources
     end
   end
 
+  def test_shallow_nested_resources_within_scope
+    with_test_routes do
+
+      get '/hello/notes/1/trackbacks'
+      assert_equal 'trackbacks#index', @response.body
+      assert_equal '/hello/notes/1/trackbacks', note_trackbacks_path(:note_id => 1)
+
+      get '/hello/notes/1/edit'
+      assert_equal 'notes#edit', @response.body
+      assert_equal '/hello/notes/1/edit', edit_note_path(:id => '1')
+
+      get '/hello/notes/1/trackbacks/new'
+      assert_equal 'trackbacks#new', @response.body
+      assert_equal '/hello/notes/1/trackbacks/new', new_note_trackback_path(:note_id => 1)
+
+      get '/hello/trackbacks/1'
+      assert_equal 'trackbacks#show', @response.body
+      assert_equal '/hello/trackbacks/1', trackback_path(:id => '1')
+
+      get '/hello/trackbacks/1/edit'
+      assert_equal 'trackbacks#edit', @response.body
+      assert_equal '/hello/trackbacks/1/edit', edit_trackback_path(:id => '1')
+
+      put '/hello/trackbacks/1'
+      assert_equal 'trackbacks#update', @response.body
+
+      post '/hello/notes/1/trackbacks'
+      assert_equal 'trackbacks#create', @response.body
+
+      delete '/hello/trackbacks/1'
+      assert_equal 'trackbacks#destroy', @response.body
+
+      get '/hello/notes'
+      assert_equal 'notes#index', @response.body
+
+      post '/hello/notes'
+      assert_equal 'notes#create', @response.body
+
+      get '/hello/notes/new'
+      assert_equal 'notes#new', @response.body
+      assert_equal '/hello/notes/new', new_note_path
+
+      get '/hello/notes/1'
+      assert_equal 'notes#show', @response.body
+      assert_equal '/hello/notes/1', note_path(:id => 1)
+
+      put '/hello/notes/1'
+      assert_equal 'notes#update', @response.body
+
+      delete '/hello/notes/1'
+      assert_equal 'notes#destroy', @response.body
+    end
+  end
+
   def test_custom_resource_routes_are_scoped
     with_test_routes do
       assert_equal '/customers/recent', recent_customers_path