fix for :shallow in router not generating helpers for create, update, and destroy actions when :only or :except are used

[#4900 state:committed]

Signed-off-by: Jeremy Kemper <jeremy@bitsweat.net>

actionpack/lib/action_dispatch/routing/mapper.rb

@@ -536,6 +536,7 @@ module ActionDispatch
           def member_name
             name
           end
+          alias_method :collection_name, :member_name
 
           def nested_path
             path
@@ -874,9 +875,9 @@ module ActionDispatch
             shallow_prefix = @scope[:module].blank? ? "" : "#{@scope[:module].tr('/', '_')}_"
 
             case action
-            when :index
+            when :index, :create
               "#{name_prefix}#{parent_resource.collection_name}"
-            when :show
+            when :show, :update, :destroy
               if parent_resource.shallow?
                 "#{shallow_prefix}#{parent_resource.member_name}"
               else
@@ -890,8 +891,6 @@ module ActionDispatch
               end
             when :new
               "new_#{name_prefix}#{parent_resource.member_name}"
-            when :update, :create, :destroy
-              nil
             else
               case @scope[:scope_level]
               when :collection

actionpack/test/dispatch/routing_test.rb

@@ -142,6 +142,12 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
         resources :comments, :except => :destroy
       end
 
+      resource  :past, :only => :destroy
+      resource  :present, :only => :update
+      resource  :future, :only => :create
+      resources :relationships, :only => [:create, :destroy]
+      resources :friendships,   :only => [:update]
+
       shallow do
         namespace :api do
           resources :teams do
@@ -729,6 +735,38 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
     end
   end
 
+  def test_resource_routes_only_create_update_destroy
+    with_test_routes do
+      delete '/past'
+      assert_equal 'pasts#destroy', @response.body
+      assert_equal '/past', past_path
+
+      put '/present'
+      assert_equal 'presents#update', @response.body
+      assert_equal '/present', present_path
+
+      post '/future'
+      assert_equal 'futures#create', @response.body
+      assert_equal '/future', future_path
+    end
+  end
+
+  def test_resources_routes_only_create_update_destroy
+    with_test_routes do
+      post '/relationships'
+      assert_equal 'relationships#create', @response.body
+      assert_equal '/relationships', relationships_path
+
+      delete '/relationships/1'
+      assert_equal 'relationships#destroy', @response.body
+      assert_equal '/relationships/1', relationship_path(1)
+
+      put '/friendships/1'
+      assert_equal 'friendships#update', @response.body
+      assert_equal '/friendships/1', friendship_path(1)
+    end
+  end
+
   def test_resource_with_slugs_in_ids
     with_test_routes do
       get '/posts/rails-rocks'
@@ -843,7 +881,7 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
       assert_equal '/account/admin/subscription', account_admin_subscription_path
     end
   end
-  
+
   def test_namespace_nested_in_resources
     with_test_routes do
       get '/clients/1/google/account'