1 files changed, 24 insertions, 4 deletions
diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index a641ea3ea9..6e3ae36a7f 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -271,7 +271,7 @@ module ActionDispatch
             controller_options = t.url_options
             options = controller_options.merge @options
             hash = handle_positional_args(controller_options,
-                                          inner_options || {},
+                                          deprecate_string_options(inner_options) || {},
                                           args,
                                           options,
                                           @segment_keys)
@@ -293,6 +293,22 @@ module ActionDispatch
 
             result.merge!(inner_options)
           end
+
+          DEPRECATED_STRING_OPTIONS = %w[controller action]
+
+          def deprecate_string_options(options)
+            options ||= {}
+            deprecated_string_options = options.keys & DEPRECATED_STRING_OPTIONS
+            if deprecated_string_options.any?
+              msg = "Calling URL helpers with string keys #{deprecated_string_options.join(", ")} is deprecated. Use symbols instead."
+              ActiveSupport::Deprecation.warn(msg)
+              deprecated_string_options.each do |option|
+                value = options.delete(option)
+                options[option.to_sym] = value
+              end
+            end
+            options
+          end
         end
 
         private
@@ -457,7 +473,7 @@ module ActionDispatch
         RUBY
       end
 
-      def url_helpers(include_path_helpers = true)
+      def url_helpers(supports_path = true)
         routes = self
 
         Module.new do
@@ -484,7 +500,7 @@ module ActionDispatch
           # named routes...
           include url_helpers
 
-          if include_path_helpers
+          if supports_path
             path_helpers = routes.named_routes.path_helpers_module
           else
             path_helpers = routes.named_routes.path_helpers_module(true)
@@ -502,6 +518,10 @@ module ActionDispatch
           # UrlFor (included in this module) add extra
           # conveniences for working with @_routes.
           define_method(:_routes) { @_routes || routes }
+
+          define_method(:_generate_paths_by_default) do
+            supports_path
+          end
         end
       end
 
@@ -729,7 +749,7 @@ module ActionDispatch
       end
 
       def find_script_name(options)
-        options.delete(:script_name) { '' }
+        options.delete(:script_name) || ''
       end
 
       def path_for(options, route_name = nil) # :nodoc: