Allow actions which start with A-Za-z_ only

2 files changed, 5 insertions, 2 deletions

diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 0c77183dc1..76c7ec35b9 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -726,7 +726,7 @@ module ActionDispatch
           path = options.delete(:path)
           action = args.first
 
-          if action && action.to_s =~ /^[\w_]+$/
+          if action && action.to_s =~ /^[A-Za-z_]\w*$/
             path = path_for_action(action, path)
             options[:action] ||= action
             options[:as] = name_for_action(action, options[:as])
diff --git a/actionpack/test/dispatch/routing_test.rb b/actionpack/test/dispatch/routing_test.rb
index a84c4d2d18..3f51798285 100644
--- a/actionpack/test/dispatch/routing_test.rb
+++ b/actionpack/test/dispatch/routing_test.rb
@@ -188,7 +188,9 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
         end
       end
 
-      resources :sheep
+      resources :sheep do
+        get "_it", :on => :member
+      end
 
       resources :clients do
         namespace :google do
@@ -996,6 +998,7 @@ class TestRoutingMapper < ActionDispatch::IntegrationTest
       assert_equal '/sheep/1', sheep_path(1)
       assert_equal '/sheep/new', new_sheep_path
       assert_equal '/sheep/1/edit', edit_sheep_path(1)
+      assert_equal '/sheep/1/_it', _it_sheep_path(1)
     end
   end