Modified polymorphic_url to check for model's namespace

This change allows using namespaced models with polymorphic_url,
in the way that you would use them without namespace.

Let's say that you have Blog::Post model in namespaced Engine. When you use
polymorphic_path with Blog::Post instances, like in form_for(@post),
it will look for blog_posts_path named url helper. As we are inside Blog::Engine,
it's annoying to always use the prefix. With this commit, blog_ prefix will be
removed and posts_path will be called.

1 files changed, 4 insertions, 0 deletions

diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index 15ee7c8051..037b94b577 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -111,6 +111,10 @@ module ActionDispatch
           args.last.kind_of?(Hash) ? args.last.merge!(url_options) : args << url_options
         end
 
+        if namespace = record.class.parents.detect { |n| n.respond_to?(:_railtie) }
+          named_route.sub!(/#{namespace._railtie.railtie_name}_/, '')
+        end
+
         url_for _routes.url_helpers.__send__("hash_for_#{named_route}", *args)
       end