1 files changed, 3 insertions, 2 deletions
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 1ea3bb17ce..10c8d748df 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -210,8 +210,9 @@ module ActionDispatch
             end
 
             def raise_generation_error(args, missing_keys)
-              message = "No route matches #{args.inspect}"
-              message << " missing required keys: #{missing_keys.inspect}"
+              constraints = Hash[@route.requirements.merge(args).sort]
+              message = "No route matches #{constraints.inspect}"
+              message << " missing required keys: #{missing_keys.sort.inspect}"
 
               raise ActionController::UrlGenerationError, message
             end