1 files changed, 39 insertions, 25 deletions

diff --git a/actionpack/lib/action_controller/polymorphic_routes.rb b/actionpack/lib/action_controller/polymorphic_routes.rb
index c60b533205..6c21bc27c5 100644
--- a/actionpack/lib/action_controller/polymorphic_routes.rb
+++ b/actionpack/lib/action_controller/polymorphic_routes.rb
@@ -1,31 +1,29 @@
 module ActionController
   module PolymorphicRoutes
-    def polymorphic_url(record_or_hash, options = {})
-      record = extract_record(record_or_hash)
-
-      case
-      when options[:action] == "new"
-        send(
-          action_prefix(options) + RecordIdentifier.singular_class_name(record) + routing_type(options)
-        )
-
-      when record.respond_to?(:new_record?) && record.new_record?
-        send(
-          action_prefix(options) + RecordIdentifier.plural_class_name(record) + routing_type(options)
-        )
-
-      else
-        send(
-          action_prefix(options) + RecordIdentifier.singular_class_name(record) + routing_type(options), record_or_hash
-        )
-      end
+    def polymorphic_url(record_or_hash_or_array, options = {})
+      record = extract_record(record_or_hash_or_array)
+
+      args = []
+      inflection =
+        case
+        when options[:action] == "new"
+          :singular
+        when record.respond_to?(:new_record?) && record.new_record?
+          :plural
+        else
+          args = [record_or_hash_or_array]
+          :singular
+        end
+
+      named_route = build_named_route_call(record_or_hash_or_array, inflection, options)
+      send(named_route, *args)
     end
 
-    def polymorphic_path(record_or_hash)
-      polymorphic_url(record_or_hash, :routing_type => :path)
+    def polymorphic_path(record_or_hash_or_array)
+      polymorphic_url(record_or_hash_or_array, :routing_type => :path)
     end
 
-    %w( edit new formatted ).each do |action|
+    %w(edit new formatted).each do |action|
       module_eval <<-EOT, __FILE__, __LINE__
         def #{action}_polymorphic_url(record_or_hash)
           polymorphic_url(record_or_hash, :action => "#{action}")
@@ -44,11 +42,27 @@ module ActionController
       end
 
       def routing_type(options)
-        "_#{options[:routing_type] || "url"}"
+        "#{options[:routing_type] || "url"}"
+      end
+
+      def build_named_route_call(records, inflection, options = {})
+        records = Array.new([extract_record(records)]) unless records.is_a?(Array)
+        base_segment = "#{RecordIdentifier.send("#{inflection}_class_name", records.pop)}_"
+
+        method_root = records.reverse.inject(base_segment) do |string, name|
+          segment = "#{RecordIdentifier.send("singular_class_name", name)}_"
+          segment << string
+        end
+
+        action_prefix(options) + method_root + routing_type(options)
       end
 
-      def extract_record(record_or_hash)
-        record_or_hash.is_a?(Hash) ? record_or_hash[:id] : record_or_hash
+      def extract_record(record_or_hash_or_array)
+        case record_or_hash_or_array
+          when Array: record_or_hash_or_array.last
+          when Hash:  record_or_hash_or_array[:id]
+          else        record_or_hash_or_array
+        end
       end
   end
 end