Make Railties tests green again.

1 files changed, 12 insertions, 7 deletions

diff --git a/actionpack/lib/action_dispatch/routing/route_set.rb b/actionpack/lib/action_dispatch/routing/route_set.rb
index 7092eb6cef..c3fda0aaef 100644
--- a/actionpack/lib/action_dispatch/routing/route_set.rb
+++ b/actionpack/lib/action_dispatch/routing/route_set.rb
@@ -11,15 +11,21 @@ module ActionDispatch
       PARAMETERS_KEY = 'action_dispatch.request.path_parameters'
 
       class Dispatcher
-        def initialize(options = {})
-          defaults = options[:defaults]
+        def initialize(options={})
+          @defaults = options[:defaults]
           @glob_param = options.delete(:glob)
         end
 
         def call(env)
           params = env[PARAMETERS_KEY]
           prepare_params!(params)
-          controller(params).action(params[:action]).call(env)
+
+          # Just raise undefined constant errors if a controller was specified as default.
+          unless controller = controller(params, @defaults.key?(:controller))
+            return [404, {'X-Cascade' => 'pass'}, []]
+          end
+
+          controller.action(params[:action]).call(env)
         end
 
         def prepare_params!(params)
@@ -34,13 +40,13 @@ module ActionDispatch
           end
         end
 
-        def controller(params, swallow=false)
+        def controller(params, raise_error=true)
           if params && params.has_key?(:controller)
             controller = "#{params[:controller].camelize}Controller"
             ActiveSupport::Inflector.constantize(controller)
           end
         rescue NameError => e
-          raise ActionController::RoutingError, e.message, e.backtrace unless swallow
+          raise ActionController::RoutingError, e.message, e.backtrace if raise_error
         end
 
         private
@@ -53,7 +59,6 @@ module ActionDispatch
           end
       end
 
-
       # A NamedRouteCollection instance is a collection of named routes, and also
       # maintains an anonymous module that can be used to install helpers for the
       # named routes.
@@ -427,7 +432,7 @@ module ActionDispatch
         req = Rack::Request.new(env)
         @set.recognize(req) do |route, params|
           dispatcher = route.app
-          if dispatcher.is_a?(Dispatcher) && dispatcher.controller(params, true)
+          if dispatcher.is_a?(Dispatcher) && dispatcher.controller(params, false)
             dispatcher.prepare_params!(params)
             return params
           end