2 files changed, 6 insertions, 14 deletions
diff --git a/actionpack/lib/action_dispatch/routing/mapper.rb b/actionpack/lib/action_dispatch/routing/mapper.rb
index 8d071b2061..1331f67a78 100644
--- a/actionpack/lib/action_dispatch/routing/mapper.rb
+++ b/actionpack/lib/action_dispatch/routing/mapper.rb
@@ -190,13 +190,12 @@ module ActionDispatch
           end
 
           def blocks
-            block = @scope[:blocks] || []
-
-            if @options[:constraints].present? && !@options[:constraints].is_a?(Hash)
-              block << @options[:constraints]
+            constraints = @options[:constraints]
+            if constraints.present? && !constraints.is_a?(Hash)
+              [constraints]
+            else
+              @scope[:blocks] || []
             end
-
-            block
           end
 
           def constraints
diff --git a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
index 49aef0bf72..e989a38d8b 100644
--- a/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
+++ b/actionpack/lib/action_dispatch/routing/polymorphic_routes.rb
@@ -124,14 +124,7 @@ module ActionDispatch
           args.last.kind_of?(Hash) ? args.last.merge!(url_options) : args << url_options
         end
 
-        if proxy
-          proxy.send(named_route, *args)
-        else
-          # we need to use url_for, because polymorphic_url can be used in context of other than
-          # current routes (e.g. engine's routes). As named routes from engine are not included
-          # calling engine's named route directly would fail.
-          url_for _routes.url_helpers.__send__("hash_for_#{named_route}", *args)
-        end
+        (proxy || self).send(named_route, *args)
       end
 
       # Returns the path component of a URL for the given record. It uses